Ultra Rapid Fire

Ultra Rapid Fire (U.R.F.) is a Featured Game Mode that was first introduced for April Fools' Day that, in a nutshell, grants all players 80% cooldown reduction and removes ability costs. The mode has since been succeeded by All Random Ultra Rapid Fire (A.R.U.R.F.), which follows the same gameplay but now utilizes the All Random draft type instead of Blind With Bans. To celebrate the 10th Anniversary of League of Legends' release, U.R.F. was brought back as an experiment.^[1]

Features

Map: Summoner's Rift
Draft: All Random
- Includes the Reroll Bench.
- Players have access to champions from the last 3 Free Rotations plus any owned champions.
Features:
- Awesome Buff of Awesomely Awesome Buffing ^e
- Champion cannon: A cannon outside each team's fountain will be present for friendly champions to select. Jumping inside the cannon renders the unit vanished, and staying in for more than 10 seconds forces them out. Units have a larger field of view of the map and can launch themselves with displacement immunity to a target location of their choice, there is a maximum range however. A circular indicator visible to all units will be placed on that specific location. Upon impact, all enemies within the area take 120 − 460 (based on level) magic damage and are knocked airborne.
- Minion gold: When minions die you get a chunk of gold whether you last hit them or not. Additionally, last hitting a minion grants more gold.
- Early surrender: Can now unanimously surrender at 8 minutes, or normal surrender at 10 minutes.
- Early homeguard: Homeguard is enabled from the start of the match.
- Turret Plating disintegrates at 6:00 instead of 14:00.
  - Turret plate health changed to 500 - 1500, based on the plate.
  - Turret plate gold increased to 300.
- Heal Embargo: Direct healing effects are only 50% effective at the beginning of the game, increasing by 1% every 30 seconds, up to 100% effective at 25 minutes.
- Shield Overload: The AD and/or AP ratios of certain shields have been halved.
Summoner Spells changes:
- Smite
  - Charge rate reduced to 30 seconds from 75 seconds.
  - Cooldown between charges reduced to 10 seconds from 15 seconds.
- Teleport
  - Disabled.
Jungle changes:
- Baron Nashor
  - Initial spawn reduced to 10 minutes.
  - Grants both the Hand of Baron and spawns a Eye of the Herald when slain.

Summoner spell CDR
Base cooldown ▶	300s ()	240s	210s ()	180s ()	90s ()	15s ()	20s ()
▼ Cooldown reduction	300s ()	240s	210s ()	180s ()	90s ()	15s ()	20s ()
33.3% (*)	N/A	N/A	N/A	N/A	N/A	10s	N/A
60% (*)	N/A	N/A	N/A	N/A	36s	N/A	N/A
80% ()	60s	48s	42s	36s	N/A	N/A	4s

Golden Spatula Club

Golden Spatula Club ( 1250): This is a new club membership that lasts for the duration of the event. Joining grants you:
- 1 random individual skin boost every game.
- 1 additional reroll each game (maximum allowed is still 2).
- 3 new randomized champion finishers. The more people on your team that are members, the fancier your finishers will be.
- Special minion taunts.

Finishers

Players who are part of the Golden Spatula club will trigger one of 3 unique Finishers, chosen at random, whenever they score a takedown on an enemy champion.
Equipping any of the following summoner icons will cause the corresponding Finisher to trigger.

Mode-Specific Changes

As balanced changes from previous events have been observed in-game despite not being documented by Riot, all possible recurring changes have been listed below and appropriately denoted. The reason for distinguishing these changes is that the values listed are those from previous event notes and may not reflect the current value.

Note that any cooldowns detailed below are as they appear in-game (i.e. they are not reduced by Ultra Rapid buff to a lower value).

This table extracts the data from Module:ChampionData/data and Template:urf_changes/data.

Champion	Damage dealt	Damage received	Other effects
Aatrox	+20%	-25%
Ahri	-5%
Akali	+10%	-10%
Alistar	+5%	-5%	Headbutt Headbutt's stun now ends as soon as the target reaches the end of its movement arc. Unbreakable Will Duration reduced to 3.5 seconds. *
Anivia	+15%	-10%	Rebirth Cooldown set to 60 seconds.
Annie	-5%
Aphelios		-5%
Ashe	+10%	-5%
Aurelion Sol			Center of the Universe Star count increased to 3 / 4 / 5 / 6 (based on level).
Azir			Arise! Limited to 3 Sand Soldiers active. Charge cooldown set to 4.8 / 4.4 / 4 / 3.6 / 3.2 seconds.
Bard	+20%	-10%	Traveler's Call Meeps thresholds reduced to one each 2 Chimes from each 5 Chimes. Meep respawn time set to 6 seconds.
Brand			Sear Stun duration reduced to 1 second.
Braum	+10%	-25%
Caitlyn	+5%	-5%
Camille		-5%
Cassiopeia	-15%		Healing done reduced by 10%.
Cho'Gath		-5%
Corki		-5%	Hextech Munitions The Package respawn timer reduced to 1 minute. Initial spawn timer unchanged.
Darius	+10%	-10%
Diana	-5%
Elise	+5%	-10%
Evelynn	+10%	-5%	Stats Base movement speed increased to 345 from 335. Hate Spike The second cast can be used 10 times during the recast period. *
Ezreal	+5%	-5%	Mystic Shot Cooldown reduction on abilities reduced to 0.333 seconds from 1.5. *
Fiddlesticks	+10%	-10%	Healing done increased by 10%.
Fiora	-5%		Healing done reduced by 5%. Stats Health growth reduced to 34 from 85.
Fizz	-10%	+5%
Gangplank	+15%		Parrrley Silver Serpent generation multiplied by 3.
Garen		+10%	Judgment Can not stack spin casts.
Gnar	+10%	-15%
Hecarim			Rampage Stacking cooldown reduction effect removed. * Devastating Charge Cooldown begins after the empowered attack is used or times out. *
Heimerdinger	-5%
Illaoi	+5%	-10%
Irelia	+5%	-15%
Janna			Eye of the Storm Shield AP ratio halved.
Jax	-5%	+5%	Stats Base health reduced to 550 from 592. Health growth reduced to 60 from 85.
Jhin	+20%
Jinx	+5%	-5%
Kalista	+10%		Stats Attack damage growth increased to 7 from 3.6.
Karma			Gathering Fire On-damage cooldown reduction reduced to 0.5 / 0.75 / 1 (still halved on basic attacks).* Inspire Shield AP ratio halved.
Karthus	-10%		Stats Base health reduced to 450 from 528. Health growth reduced to 65 from 87.
Kassadin		-5%	Null Sphere Shield AP ratio halved. Riftwalk Cooldown is set to 3 / 2 / 1 seconds. * Maximum Riftwalk stacks reduced to 2.
Katarina	+5%	-5%	Stats Base movement speed increased to 345 from 340. Health growth increased to 105 from 92.
Kayle	-5%		Healing done reduced by 10%.
Kindred			Dance of Arrows Cooldown while in Wolf's Frenzy set to 0.5 seconds. *
LeBlanc	+10%
Lee Sin	+5%	-5%
Lucian		-5%
Lulu			Help, Pix! Shield AP ratio halved.
Lux			Prismatic Barrier Shield AP ratio halved.
Malphite	-5%
Malzahar	-15%
Maokai	-10%	+5%	Healing done reduced by 10%. Sapling Toss Limited to 5 Saplings active.
Master Yi		+10%	Healing done reduced by 10%. Alpha Strike Cooldown begins after the dash.
Miss Fortune	+10%	-5%
Mordekaiser	+5%	-5%
Morgana	-8%		Black Shield Shield AP ratio halved.
Nami		+5%	Healing done reduced by 5%.
Nautilus			Titan's Wrath Shield health ratio halved.
Nidalee	+10%	-10%
Nocturne	-5%
Nunu & Willump	+10%	-10%	Healing done increased by 10%. Snowball Barrage Nunu may recast the ability 10 times before it's Willump's Turn. *
Olaf		-5%
Orianna	-5%	+5%	Command Protect Shield AP ratio halved.
Ornn	+10%	-15%	Stats Base movement speed increased to 340 from 335. Base health increased to 600 from 565. Health growth increased to 105 from 95.
Pantheon	+10%	-10%
Pyke	+5%	-10%
Qiyana	+5%	-5%
Quinn	+5%	-10%
Rakan			Battle Dance Shield AP ratio halved.
Rammus	+10%	-12%
Rek'Sai	+10%	-10%	Stats Base health increased to 600 from 570. Health growth increased to 100 from 85. Attack damage growth increased to 4.5 from 3.35. Base armor increased to 38 from 33. Attack speed growth increased to 3% from 2%.
Riven		-10%	Valor Shield AD ratio halved.
Rumble	-10%		Stats Base health reduced to 550 from 589. Health growth reduced to 65 from 85. Junkyard Titan No longer silences Rumble. No Danger Zone bonuses. Scrap Shield Shield AP ratio halved. Electro Harpoon Slow no longer stacks.*
Ryze	+5%	-10%
Sejuani		-5%
Senna	+10%	-5%
Sett	+5%	-10%
Shaco	-15%	+10%	Jack in the Box Limited to 6 Boxes active.
Shen			Ki Barrier Shield health ratio halved. Shadow Dash Cooldown begins after dashing.
Sion	+10%	-10%
Sivir	-8%
Skarner	-5%		Crystal Slash No longer reduces its cooldown on-hit.* Crystalline Exoskeleton Shield AP and health ratios halved.
Sona			Stats Base health reduced to 463 from 480. Health growth reduced to 36 from 77. Power Chord Global cooldown set to 0.5 seconds. Aria of Perseverance Shield AP ratio halved. Cooldown is only reduced by 60%, rather than 80%.
Syndra	-10%	-5%
Tahm Kench	+30%	-30%	Shielding done increased by 10%. Healing done increased by 10%. Stats Base movement speed increased to 340 from 335. Base health increased to 600 from 538. Health growth increased to 120 from 102. Tongue Lash Cooldown is only reduced by 60%, rather than 80%.
Taliyah	+10%	-5%
Taric			Bastion Shield ratios halved.
Teemo	-5%		Noxious Trap Limited to 12 Mushrooms active.
Thresh	+15%	-15%	Damnation Gains 3 souls per pick-up.
Udyr	+5%	-10%
Urgot	+10%	-10%
Vayne		-5%
Veigar	-5%
Viktor	-5%
Vladimir	-8%	+8%	Healing done reduced by 5%.
Wukong	-5%	+5%	Stats Attack damage growth reduced to 3 from 4. Base attack damage reduced to 63 from 68. Health growth reduced to 70 from 85.
Xayah	-5%
Yasuo	+10%	-5%
Yorick		-5%
Yuumi	-20%		Healing done reduced by 30%. Zoomies Cooldown increased by 100%.
Zac			Stats Health growth increased to 105 from 95. Base armor increased to 38 from 33. Armor growth increased to 4.5 from 3.5. Magic resistance growth increased to 1.75 from 1.25. Cell Division Cooldown set to 60 seconds.
Zed	-10%		Stats Base health reduced to 550 from 582. Health growth reduced to 60 from 85.
Zilean	+20%	-5%	Time Bomb Cooldown increased to 3.6 / 3.3 / 3 / 2.7 / 2.4 seconds. Stun duration reduced by 0.6 seconds. Rewind Cooldown increased to 8 / 7 / 6 / 5 / 4 seconds.
Zoe	+10%

Archangel's Staff

Uses the Quick Charge version.

Dark Seal

This item is disabled.

Manamune

Uses the Quick Charge version.

Mejai's Soulstealer

This item is disabled.

Rod of Ages

Uses the Quick Charge version.

Tear of the Goddess

Uses the Quick Charge version.

Electrocute

Cooldown changed to 10 seconds at all levels.

Predator

Cooldown changed to 80 − 50 (based on level) seconds.

Dark Harvest

Cooldown changed to 12 seconds.
Base damage changed to 10 − 50 (based on level).
AP ratio changed to 10% AP.
AD ratio changed to 20% bonus AD.
Bonus damage per soul changed to 2.

Taste of Blood

Cooldown changed to 10 seconds.

Ghost Poro

Cooldown changed to 25 seconds.

Phase Rush

Cooldown changed to 10 seconds.

Nullifying Orb

Cooldown changed to 30 seconds.

Transcendence

CDR at level 10 changed to 15%.
AP per 1% CDR overcap changed to 0.5.
AD per 1% CDR overcap changed to 0.3.

Gathering Storm

Stats gained every 6 minutes.

Grasp of the Undying

Triggered attack bonus health changed to 15.
Ranged champions triggered attack bonus health changed to 9.

Aftershock

Cooldown changed to 15 seconds.

Demolish

Cooldown changed to 30 seconds.

Conditioning

Initial cooldown changed to 6 minutes.

Magical Footwear

Boots granted at 6 minutes.

Perfect Timing

Initial cooldown changed to 4 minutes.

Minion Dematerializer

Initial cooldown changed to 2 minutes.

Biscuit Delivery

Biscuit interval changed to 1.5 minutes.

Rune Specific Substitutions

Substitutions

Unsealed Spellbook is exchanged with Prototype: Omnistone.
Cosmic Insight is exchanged with Approach Velocity.
Ingenious Hunter is exchanged with Ravenous Hunter.
Ultimate Hunter is exchanged with Ravenous Hunter.
Manaflow Band is exchanged with Nullifying Orb.
Presence of Mind is exchanged with Triumph.
Lethal Tempo is exchanged with Press the Attack.

Patch History

V10.11

Akali
- Bonus damage dealt changed to +10% from +15%.
Camille
- Bonus damage dealt changed to 0% from +5%.
Fiddlesticks
- Bonus damage dealt changed to +10% from +5%.
- Incoming damage modifier changed to -10% from -5%.
Fiora
- Bonus damage dealt changed to -5% from -10%.
Heimerdinger
- Bonus damage dealt changed to -5% from -10%.
Ivern
- Incoming damage modifier changed to 0% from -5%.
Janna
- Howling Gale
  - Removed: No longer has 100% increased cooldown.
Kassadin
- Bonus damage dealt changed to 0% from +5%.
Lucian
- Bonus damage dealt changed to 0% from +5%.
Maokai
- Bonus damage dealt changed to -10% from -5%.
Pantheon
- Bonus damage dealt changed to +10% from +5%.
Ornn
- Bonus damage dealt changed to +10% from +15%.
Quinn
- Incoming damage modifier changed to -10% from -5%.
Qiyana
- Incoming damage modifier changed to -5% from -10%.
Rumble
- Shielding modifier changed to 0% from -10%.
Sett
- Bonus damage dealt changed to +5% from +10%.
Shaco
- Bonus damage dealt changed to -15% from -12%.
Sona
- Healing modifier changed to 0% from -5%.
- Shielding modifier changed to 0% from -5%.
Tahm Kench
- Bonus damage dealt changed to +30% from +25%.
- Incoming damage modifier changed to -30% from -25%.
Taliyah
- Bonus damage dealt changed to +10% from +15%.
Thresh
- Bonus damage dealt changed to +15% from +10%.
Udyr
- Bonus damage dealt changed to +5% from +10%.
Vayne
- Decreases incoming damage by 5%.
Volibear
- Bonus damage dealt changed to 0% from -5%.
- Incoming damage modifier changed to 0% from +5%.
Xayah
- Bonus damage dealt changed to -5% from -10%.
Yuumi
- Zoomies
  - Increased cooldown increased to +100% from +25%.
Zac
- Incoming damage modifier changed to 0% from -5%.

V10.10 - May 15th Hotfix

Aatrox
- Bonus damage dealt changed to +20% from +25%.
Ahri
- Bonus damage dealt changed to -5% from -8%.
Cho'Gath
- Reduces incoming damage by 5%.
Corki
- Reduces incoming damage by 5%.
Diana
- Damage dealt reduced by 5%.
Fiddlesticks
- Increases healing by 10%.
- Damage dealt increased by 5%.
- Reduces incoming damage by 5%.
Fizz
- Increases incoming damage by 5%.
Kai'Sa
- Bonus damage dealt changed to 0% from -5%.
Kassadin
- Incoming damage modifier changed to -5% from -10%.
Miss Fortune
- Bonus damage dealt changed to +10% from +5%.
Mordekaiser
- Damage dealt increased by 5%.
Nunu
- Damage dealt increased by 10%.
Orianna
- Damage dealt reduced by 5%.
Pantheon
- Damage dealt increased by 5%.
Thresh
- Incoming damage modifier changed to -15% from -10%.
Yasuo
- Bonus damage dealt changed to +10% from +15%.
Yuumi
- Zoomies
  - New Effect: Cooldown increased by 25%.

V10.10

Alistar
- Incoming damage modifier changed to -5% from -10%.
Annie
- Damage dealt reduced by 5%.
Ashe
- Damage dealt increased by 10%.
- Reduces incoming damage by 5%.
Caitlyn
- Damage dealt increased by 5%.
- Reduces incoming damage by 5%.
Corki
- Bonus damage dealt changed to 0% from +10%.
Diana
- Bonus damage dealt changed to 0% from -5%.
Elise
- Bonus damage dealt changed to +5% from +10%.
Evelynn
- Bonus damage dealt changed to +10% from +20%.
- Reduces incoming damage by 5%.
Ezreal
- Damage dealt increased by 5%.
- Reduces incoming damage by 5%.
Gangplank
- Parrrley
  - Silver Serpent generation multiplied by 3.
Gnar
- Incoming damage modifier changed to -15% from -10%.
Illaoi
- Incoming damage modifier changed to -10% from -15%.
Ivern
- Incoming damage modifier changed to -5% from -10%.
Janna
- Shielding modifier changed to 0% from -8%.
Jax
- Increases incoming damage by 5%.
Jayce
- Bonus damage dealt changed to 0% from -5%.
Jinx
- Damage dealt increased by 5%.
- Reduces incoming damage by 5%.
Karthus
- Bonus damage dealt changed to -10% from -15%.
Katarina
- Bonus damage dealt changed to +5% from +10%.
Leona
- Bonus damage dealt changed to 0% from -3%.
- Incoming damage modifier changed to 0% from -10%.
Lucian
- Damage dealt increased by 5%.
- Reduces incoming damage by 5%.
Maokai
- Increases incoming damage by 5%.
Miss Fortune
- Damage dealt increased by 5%.
- Reduces incoming damage by 5%.
Nami
- Increases incoming damage by 5%.
Nidalee
- Bonus damage dealt changed to +10% from -5%.
- Reduces incoming damage by 10%.
Olaf
- Reduces incoming damage by 5%.
Ornn
- Bonus damage dealt changed to +15% from +10%.
- Incoming damage modifier changed to -15% from -25%.
Poppy
- Incoming damage modifier changed to 0% from -5%.
Pyke
- Damage dealt increased by 5%.
- Incoming damage modifier changed to -10% from -5%.
- Healing modifier changed to 0% from -5%.
Quinn
- Bonus damage dealt changed to +5% from +15%.
- Reduces incoming damage by 5%.
Rakan
- Shielding modifier changed to 0% from -10%.
Rammus
- Bonus damage dealt changed to +10% from +15%.
Rek'Sai
- Bonus damage dealt changed to +10% from +5%.
- Incoming damage modifier changed to -10% from -20%.
Ryze
- Bonus damage dealt changed to +5% from +2%.
Sejuani
- Incoming damage modifier changed to -5% from -10%.
Senna
- Damage dealt increased by 10%.
- Reduces incoming damage by 5%.
Sett
- Damage dealt increased by 10%.
- Incoming damage modifier changed to -10% from -5%.
Shaco
- Increases incoming damage by 10%.
Sion
- Incoming damage modifier changed to -10% from -15%.
Skarner
- Reduces damage dealt by 5%.
Sona
- Bonus damage dealt changed to 0% from -5%.
Sylas
- Incoming damage modifier changed to 0% from -5%.
Talon
- Bonus damage dealt changed to 0% from -5%.
Udyr
- Incoming damage modifier changed to -10% from -15%.
Urgot
- Bonus damage dealt changed to +10% from +15%.
- Incoming damage modifier changed to -10% from -20%.
Vel'Koz
- Bonus damage dealt changed to 0% from -5%.
Vi
- Bonus damage dealt changed to 0% from -5%.
Vladimir
- Increases incoming damage by 8%.
Volibear
- Reduces damage dealt by 5%.
- Increases incoming damage by 5%.
Wukong
- Increases incoming damage by 5%.
Xayah
- Bonus damage dealt changed to -10% from -12%.
Yorick
- Incoming damage modifier changed to -5% from -10%.
Yuumi
- Bonus damage dealt changed to -20% from -10%.
- Healing modifier changed to -30% from -25%.
Zac
- Incoming damage modifier changed to -5% from -15%.

V10.1 - January 16th Hotfix

Aphelios
- Reduces incoming damage by 5%.
Fizz
- Bonus damage dealt changed to -10% from -5%.
Ivern
- Incoming damage modifier changed to -10% from -15%.
Jax
- Damage dealt reduced by 5%.
Maokai
- Reduces healing done by 5%.
Mordekaiser
- Reduces incoming damage by 5%.
Nami
- Reduces healing done by 5%.
Nidalee
- Reduces incoming damage by 5%.
Nunu & Willump
- Incoming damage modifier changed to -10% from -5%.
Orianna
- Increases incoming damage by 5%.
Pantheon
- Reduces incoming damage by 5%.
Poppy
- Reduces incoming damage by 5%.
Pyke
- Reduces incoming damage by 5%.
Ryze
- Incoming damage modifier changed to -10% from -5%.
Sett
- Reduces incoming damage by 5%.
Syndra
- Bonus damage dealt changed to -10% from -5%.
Taliyah
- Reduces incoming damage by 5%.
Vi
- Damage dealt reduced by 5%.
Viktor
- Damage dealt reduced by 5%.
Vladimir
- Reduces healing done by 5%.
Yuumi
- Reduces healing done by 15%.
Zilean
- Reduces incoming damage by 5%.

V9.21 - October 30th Hotfix

Cassiopeia
- New Effect: Reduces incoming healing by 5%.
- Bonus damage dealt reduced to -15% from -12%.

Camille
- Bonus damage dealt reduced to 5% from 10%.
- Incoming healing increased to -5% from -10%.

Fiora
- New Effect: Damage dealt reduced by 10%.
- New Effect: Reduces incoming healing by 5%.

Kalista
- Bonus damage dealt reduced to 10% from 20%.

Katarina
- Bonus damage dealt reduced to 10% from 15%.
- Incoming reduced damage reduced to 5% from 10%.

Pyke
- Incoming reduced healing increased to 5% from 10%.

Rammus
- Bonus damage dealt increased to 15% from 10%.
- Incoming reduced damage increased to 12% from 10%.

Dark Harvest
- Base damage reduced to 10 − 50 (based on level) from 15 − 55 (based on level).
- AD ratio reduced to 20% bonus AD from 25% bonus AD.

V9.21 - October 28th Hotfix

Elder Dragon
- Initial spawn increased to 9 minutes from 6.
Aspect of the Dragon
- Duration reduced to 120 seconds.
Empowered Aspect of the Dragon (kills beyond first)
- Duration reduced to 180 seconds.
Turret Plating
- Turret plate health changed to 500 - 1500, based on the plate.
- Turret plate gold increased to 300.
Transcendence
- CDR at level 10 increased to 15%.
- AP per 1% CDR overcap reduced to 0.5.
- AD per 1% CDR overcap reduced to 0.3.
Gathering Storm
- Stats gained every 6 minutes instead of every 4.5 minutes.

V9.5 - March 11th Hotfix

Camille
- Damage dealt increased by 10%.
- Decreases incoming damage by 10%.
LeBlanc
- Damage dealt increased by 10%.
Morgana
- Damage dealt reduced by 8%.

V9.5

Aatrox
- Bonus damage dealt changed to 20% from 15%.
Ahri
- Bonus damage dealt changed to -8% from -5%.
Akali
- Damage dealt increased by 15%.
- Decreases incoming damage by 10%.
Alistar
- Damage dealt increased by 5%.
- Decreases incoming damage by 10%.
Anivia
- Damage dealt increased by 15%.
Aurelion Sol
- Bonus damage dealt increased by 10% from 5%.
Bard
- Bonus damage dealt increased by 20% from 15%.
Braum
- Incoming reduced damage increased to 25% from 20%.
Darius
- Bonus damage dealt changed to 10% from 5%.
Elise
- Damage dealt increased by 10%.
- Decreases incoming damage by 10%.
Evelynn
- Bonus damage dealt changed to 20% from 10%.
Fizz
- Damage dealt reduced by 5%.
Gangplank
- Bonus damage dealt changed to 15% from 10%.
Garen
- Bonus damage dealt changed to -10% from -5%.
Gnar
- Bonus damage dealt changed to 10% from 5%.
Heimerdinger
- Damage dealt reduced by 5%.
Ivern
- Damage dealt increased by 10%.
- Decreases incoming damage by 15%.
Jayce
- Damage dealt reduced by 5%.
Jhin
- Damage dealt increased by 20%.
Katarina
- Damage dealt increased by 15%.
- Decreases incoming damage by 10%.
Nocturne
- Damage dealt reduced by 5%.
Quinn
- Damage dealt increased by 15%.
Sion
- Damage dealt increased by 10%.
Sivir
- Bonus damage dealt changed to -8% from -5%.
Sona
- Bonus damage dealt changed to 0% from -5%.
Syndra
- Damage dealt reduced by 5%.
Tahm Kench
- Incoming reduced damage increased to 25% from 20%.
Taliyah
- Damage dealt increased by 15%.
Thresh
- Bonus damage dealt changed to 10% from 5%.
- Incoming reduced damage increased to 10% from 5%.
- Damnation
  - Souls now grant 3 stacks.
Udyr
- Damage dealt increased by 10%.
- Decreases incoming damage by 15%.
Urgot
- Bonus damage dealt changed to 15% from 5%.
Vladimir
- Damage dealt reduced by 8%.
Yasuo
- Bonus damage dealt changed to 15% from 10%.
- Incoming reduced damage increased to 10% from 5%.
Zac
- Decreases incoming damage by 15%.
Zilean
- Bonus damage dealt changed to 20% from 10%.
- Time Bomb
  - Stun duration increased to 0.6 seconds from 0.5.
Zoe
- Damage dealt increased by 10%.
Aspect of the Dragon
- Damage over 3 seconds reduced to 30 (+ 15 per Dragon) from 45 (+ 24 per Dragon).
Empowered Aspect of the Dragon
- Damage over 3 seconds reduced to 90 (+ 15 per Dragon) from 135 (+ 15 per Dragon).

V9.4

Garen
- New Effect: Damage dealt reduced by 5%.
Arcane Comet
- Bug Fix: Triggering Arcane Comet while inside the Catapult of Champions no longer lets you right click to fire a second Arcane Comet like a skillshot.
Aspect of the Dragon
- The first Aspect of the Dragon is less tower-melty.

V9.2 - Hotfix 2 (January 31st, 2019)

Aatrox
- Incoming reduced damage increased to 20% from 10%.
- Bonus damage dealt increased to 15% from 10%.
Aurelion Sol
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Corki
- New Effect: Damage dealt increased by 10%.
Darius
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Gangplank
- New Effect: Damage dealt increased by 10%.
Illaoi
- New Effect: Decreases incoming damage by 15%.
- New Effect: Damage dealt increased by 5%.
Irelia
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Leona
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Ornn
- Incoming reduced damage increased to 25% from 20%.
Rek'Sai
- Incoming reduced damage increased to 20% from 10%.
Sion
- New Effect: Decreases incoming damage by 15%.
Sona
- Bonus damage dealt changed to -5% from -10%.
Tahm Kench
- Incoming reduced damage increased to 20% from 10%.
Thresh
- New Effect: Decreases incoming damage by 5%.
- New Effect: Damage dealt increased by 5%.
Urgot
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Yasuo
- New Effect: Decreases incoming damage by 5%.
- New Effect: Damage dealt increased by 10%.
Zac
- New Effect: Decreases incoming damage by 15%.
Zilean
- New Effect: Damage dealt increased by 10%.
Dark Harvest
- Base damage reduced to 15 − 55 (based on level) from 20 − 60 (based on level).
- AP ratio reduced to 10% AP from 15% AP.
- Bonus damage per soul reduced to 2 from 5.
Dragon Slayer
- Reduced turret damage bonus from Elder Dragon by half on first Elder Dragon.

V9.2 - Hotfix 1 (January 29th, 2019)

Ahri
- New Effect: Damage dealt reduced by 5%.
Bard
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 15%.
Braum
- New Effect: Decreases incoming damage by 20%.
- New Effect: Damage dealt increased by 10%.
Gnar
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Kai'Sa
- New Effect: Damage dealt reduced by 5%.
Malzahar
- New Effect: Damage dealt reduced by 8%.
Master Yi
- New Effect: Increases incoming damage by 5%.
- New Effect: Damage dealt reduced by 5%.
Ornn
- Incoming reduced damage increased to 20% from 10%.
Rammus
- New Effect: Decreases incoming damage by 10%.
Rek'Sai
- New Effect: Decreases incoming damage by 10%.
- New Effect: Damage dealt increased by 5%.
Ryze
- Bonus damage dealt changed to 0% from -10%.
Sivir
- New Effect: Damage dealt reduced by 5%.
Tahm Kench
- New Effect: Decreases incoming damage by 10%.
Wukong
- Bonus damage dealt changed to -5% from -10%.
Xayah
- New Effect: Damage dealt reduced by 5%.

V9.2 - Lunar Revel 2019 (January 28th, 2019)

Fixed the bug with the Reroll Bench - it now works.
Disabled Teleport but added the Champion Cannon.
Baron Nashor spawns at 10 minutes and grants both the Hand of Baron and Eye of the Herald when slain.
Elemental Drakes are replaced with a special Elder Dragon that spawns at 6 minutes and grants Aspect of the Dragon as well as a stack of every single elemental dragon's Dragon Slayer when defeated.
Minion gold: When minions die you get a chunk of gold whether you last hit them or not. Additionally, last hitting a minion grants more gold.
Golden Spatula Club ( 1250): This is a new club membership that lasts for the duration of the event. Joining grants you:
- 1 random individual skin boost every game.
- 1 additional reroll each game (maximum allowed is still 2).
- 3 new randomized champion finishers. The more people on your team that are members, the fancier your finishers will be.
- Special minion taunts.
Early surrender: Can now unanimously surrender at 8 minutes, or normal surrender at 10 minutes.
Early homeguard: Homeguard is enabled from the start of the match.
Bonus turret damage: Rip down enemy structures a bit faster with our newest tweak to URF's Awesome Buff of Awesomeness.
- Turret Plating disintegrates at 6:00 instead of 14:00.
Champion balancing:
- Aatrox
  - New Effect: Damage dealt increased by 10%.
  - New Effect: Decreases incoming damage by 10%.
- Evelynn
  - Base movement speed increased to 345 from 335.
  - New Effect: Damage dealt increased by 10%.
- Fiora
  - Health growth reduced to 60 from 85.
  - Attack speed growth reduced to 2.5% from 3.2%.
- Jax
  - Base health reduced to 550 from 592.
  - Health growth reduced to 60 from 85.
- Kalista
  - Attack damage growth increased to 7 from 3.6.
  - New Effect: Damage dealt increased by 20%.
- Karthus
  - Base health reduced to 450 from 528.
  - Health growth reduced to 65 from 87.
  - New Effect: Damage dealt reduced by 15%.
- Katarina
  - Base movement speed increased to 345 from 340.
  - Health growth increased to 105 from 92.
- Ornn
  - Base movement speed increased to 340 from 335.
  - Base health increased to 600 from 565.
  - Health growth increased to 105 from 95.
  - New Effect: Damage dealt increased by 10%.
  - New Effect: Decreases incoming damage by 10%.
- Rek'Sai
  - Base health increased to 600 from 570.
  - Health growth increased to 100 from 85.
  - Attack damage growth increased to 4.5 from 3.35.
  - Base armor increased to 38 from 33.
  - Attack speed growth increased to 3% from 2%.
- Rumble
  - Base health reduced to 550 from 589.
  - Health growth reduced to 65 from 85.
  - New Effect: Damage dealt reduced by 10%.
- Ryze
  - New Effect: Damage dealt reduced by 10%.
- Sona
  - Base health reduced to 460 from 480.
  - Health growth reduced to 50 from 77.
  - Armor growth reduced to 3 from 3.3.
  - New Effect: Damage dealt reduced by 10%.
- Tahm Kench
  - Base movement speed increased to 340 from 335.
  - Base health increased to 600 from 538.
  - Health growth increased to 120 from 102.
  - New Effect: Damage dealt increased by 20%.
- Teemo
  - Noxious Trap
    - Trap limit reduced to 12 from 20.
- Wukong
  - Attack damage growth reduced to 3 from 4.
  - Base attack damage reduced to 63 from 68.
  - Health growth reduced to 70 from 85.
  - New Effect: Damage dealt reduced by 10%.
- Zac
  - Health growth increased to 105 from 95.
  - Base armor increased to 38 from 33.
  - Armor growth increased to 4.5 from 3.5.
  - Magic resistance growth increased to 1.75 from 1.25.
- Zed
  - Base health reduced to 550 from 582.
  - Health growth reduced to 60 from 85.
  - New Effect: Damage dealt reduced by 10%.
Rune balancing:
- Dark Harvest
  - Cooldown reduced to 12 seconds from 45.
- Electrocute
  - Cooldown reduced to 10 seconds at all levels from 25 − 20 (based on level).
- Predator
  - Cooldown reduced to 80 − 50 (based on level) seconds from 150 − 100 (based on level).
- Ghost Poro
  - Cooldown reduced to 25 seconds from 60.
- Taste of Blood
  - Cooldown reduced to 10 seconds from 20.
- Kleptomancy
  - Buffed probabilities commensurate with game speed increase.
- Magical Footwear
  - Boots granted at 6 minutes instead of 10.
- Biscuit Delivery
  - Biscuit interval reduced to 1.5 minutes from 3.
- Minion Dematerializer
  - Initial cooldown reduced to 2 minutes from 4.
- Perfect Timing
  - Initial cooldown reduced to 4 minutes from 10.
- Presence of Mind
  - ~~Ultimate cooldown reduction reduced to 6% from 10%.~~ Contrary to official patch notes, this rune will be substituted.
- Aftershock
  - Cooldown reduced to 15 seconds from 35.
- Grasp of the Undying
  - Triggered attack bonus health increased to 15 from 5.
  - Ranged champions triggered attack bonus health increased to 9 from 3.
- Demolish
  - Cooldown reduced to 30 seconds from 45.
- Conditioning
  - Initial cooldown reduced to 6 minutes from 10.
- Phase Rush
  - Cooldown reduced to 10 seconds from 15.
- Nimbus Cloak
  - Cooldown reduced to 30 seconds from 60.
- Nullifying Orb
  - Cooldown reduced to 30 seconds from 60.
- Gathering Storm
  - Stats gained every 4.5 minutes instead of every 10 minutes.

May 26 2018 (ARURF 2)

To apologize for the Clash Beta failing, ARURF was enabled.
Due to a bug, ARURF was still using the same version of the All Random used previously and not the new version currently active on ARAM (i.e. didn't have the Reroll Bench).

December 2017 (Snow Battle ARURF)

Special variant of ARURF with a limited champion pool.

September 23rd 2016 (ARURF 1)^[2]

Now uses All Random draft mode. Reroll Credits are shared with ARAM.
No champions are disabled.

April 22nd 2016 (URF 3)^[3]

Everything now deals normal amounts of damage and has normal amounts of health.
On top of previous changes, the follow champions have received changes: Aurelion Sol, Bard, Corki, Kindred, Mordekaiser, Ryze, Rumble, Tahm Kench, and Taric.

April 1st 2015 (URF 2)^[4]

Fixed bug where champions still required sufficient maximum mana.
Bonus attack speed is now increased by 1.5x on Melee damages.
Melee champions now gain 25% bonus critical strike damage, too.
Everything now deal TONS of damage (x1000).
Everything now has TONS of health (x1000).
The following champions have specific changeS: Aatrox, Alistar, Anivia, Azir, Bard, Brand, Ezreal, Hecarim, Janna, Karma, Kassadin, Maokai, Master Yi, Rek'Sai, Renekton, Ryze, Rumble, Shen, Shyvana, Skarner, Shaco, Sona, Taric, Teemo, Tryndamere, Yasuo, Zac and Zilean, as well as those affected by Shield Overload.
- The following champions are disabled: Karthus
- Finishers introduced.

April 8th 2014 Hotfix^[5]

Hecarim, Kayle, Soraka, Nidalee, Alistar, Skarner disabled.

April 6th 2014 Hotfix

Sona disabled.

April 1st 2014 (URF)^[6]

Game mode added.
The following champions have specific changes: Gragas, Irelia, Master Yi, Shaco, Teemo and Zilean, as well as those affected by Shield Overload.
The following champions are disabled: Kassadin and Ryze.
Known bug: Champions require sufficient maximum mana for the cast to be possible. This only affects Riftwalk, Living Artillery (at level 6) and Ravenous Flock.

Buff History

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
This unit deals X% of its normal damage (when applicable)
This unit receives X% of its normal damage (when applicable)
+100% damage to Infernal Drakes
Pew Pew Pew

[Source: Good News Lee Sin]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
This unit deals X% of its normal damage (when applicable)
This unit receives X% of its normal damage (when applicable)
Your attacks have a small change to rework Ryze
Takes 30% reduced damage from Unicorns.

[Source: Star Guardian Urgot]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
This unit deals X% of its normal damage (when applicable)
This unit receives X% of its normal damage (when applicable)
This unit want sto be an astronaut when it grows up
Please do not feed the manatees (unless you have ice cream sandwiches)

[Source: The Fourth Item on That One List on the Internet (Scientists Hate It!)]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
Current Forecast: Chilly, with a moderate to high chance of violent death
+13 to Certainty... I think?

[Source: This Winter Wonderland Made Possible By Players Like You!]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
This unit deals tons of damage.
Every third hit will deal 100% of the damage it was going to do.

[Source: No No No! Please Don't Shake the Poro!]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
Participation Bonus: Activated!
+1 Really Useful Tooltips

[Source: I Learned How To Do This At Space Wizard School]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
+40000 Potato Affinity
This unit wants to be the very best, like no one ever was.

[Source: WELL WOULDN'T YOU LIKE TO KNOW]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Sources of bonus attack speed are doubled on Ranged champions, 1.5x on Melee champions
Critical strikes deal 25% additional damage
Health costs reduced by 50%
This unit deals tons of damage.
Damage received by champions not in this game is reduced by 200%.

[Source: Kittens, the Wellspring of All That Is Good in This Dark and Blighted World]

Mana and Energy consumption increased by 100%
+200% Cooldown Inflation on Abilities, Activated Items and Summoner Spells
+50% Anti-Tenacity
+225 Movement Speed Reduction
+200% Delay between basic attacks
Critical strikes deal 50% of total attack damage
This unit critically strikes on 150% of its attacks
Protection against superfluous decisiveness
This unit is vulnerable to consequences

[Source: Look Before You Leap]

Mana and Energy consumption reduced by 100%
+80% Cooldown Reduction on Abilities, Activated Items and Summoner Spells
+25% Tenacity and Tenaciousness
+60 Movement Speed and Speed while Moving
Doubles bonus attack speed on Ranged champions
Ranged champions gain 25% critical strike damage
+35% Dinosaur Resistance
Keep out of reach of designers and people who like sane tooltips
This unit is currently able to traverse the Abyss

[Source: Dark Voodoo Magicks]

Trivia

Before URF2020, Mana is not considered to be expended for the purposes of Eternity (i.e. you do not restore health), but is for the purposes of Mana Charge (i.e. you can increase your maximum mana for Manamune or Archangel's Staff.
- Seraph's Embrace's Mana Shield does not grant any shield. This is likely a bug caused by the fact no mana is consumed, and so none is converted into a shield.
Cooldown Reduction cannot be increased beyond the 80% granted by the Awesome Buff.
- Transcendence will grant adaptive stats for cooldown reduction purchased in excess of 80% at half the normal conversion rate.
- Crest of the Ancient Golem is completely useless except on champions using Transcendence.
On the 2014 version, a champion must have had sufficient maximum mana in order to activate the ability. Realistically, only pre-rework Swain's Ravenous Flock was affected and the ability would toggle-off once the cost scaled beyond Swain's maximum mana. As of 2015, ability costs are now removed.
The name, Ultra Rapid Fire, was likely chosen because its initials spell Urf, Riot's April Fool's mascot.
The "This unit is currently able to traverse the Abyss" is possibly a reference to Dark Souls, where the player requires to equip a certain item to traverse "The Abyss" and fight a certain boss. The Abyss is also another name for The Void.
The initial event was meant to end on April 7, but was extended to April 13 due to the positive feedback. They also disabled the use of more champions.
"Defeat" is replaced with "2nd Place" in the post-game lobby.
- This change was also present in-game when the Nexus was destroyed in early versions of URF, but was removed when Riot updated the game client's announcement assets.
The "TONS" feature of the 2015 iteration of URF was also reflected in the death recap, showing, for example: Disintegrate: TONS (50%).
ARURF was around 20-25% of hours by the end of the last long run.^[7]
URF was confirmed to be coming back with all champions available on October 28th through November 8th.^[8]
- This is also the first time in over 4 years in which URF is making it's return.
The icon for the in-game Awesome Buff of Awesomely Awesome Buffing is edited from Urf's appearance in the Welcome to Planet Urf login screen.
- The old icon for the buff might have been reused from another buff or effect icon.

Unveiling the future of League of Legends (N.U.R.F.)

By Paul 'Pabro' Bellezza^[9]

"What we're calling New Ultra Rapid Fire raises the stakes by delivering a slow, sophisticated, and stoic strategic showcase that tests teams' abilities in new and dynamic ways while not restricting the highest tier of play to those with sub-millisecond response times." Continue reading for more on the most intense gamemode yet: N.U.R.F!

Almost one year ago, we debuted a new way to play League of Legends in a silly, fun game mode that turned competitive balance on its head in celebration of the yearly troll-fest known as April Fools. While we were ultimately kidding, many of our designers saw the opportunity to work on a true evolution of League gameplay inspired by URF. After reviewing player feedback and hammering out brass tacks, we felt confident we created the most refined gameplay experience League has inspired yet, all in time to iterate in preparation of the next competitive season.

What we're calling New Ultra Rapid Fire raises the stakes by delivering a slow, sophisticated, and stoic strategic showcase that tests teams' abilities in new and dynamic ways while not restricting the highest tier of play to those with sub-millisecond response times.

Normally, a League match is a fast-paced slugfest that ranges from top to bottom lane and across Summoner's Rift. We want to broaden the pool of high-level talent to include expert tacticians previously excluded by something so trivial as the necessity of hyper-twitch reflexes.

There's a lot to talk about, but with the entirely accidental leaks of some New Ultra Rapid Fire assets, we thought it'd be better to just show you. Tomorrow, we'll release the proverbial kraken known as New Ultra Rapid Fire to live servers.

Here's a preview of some of the gameplay refinements coming tomorrow night when New Ultra Rapid Fire debuts:

+100% mana and energy cost on all abilities
+200% cooldown inflation on abilities, items and summoner spells
+225 movement speed reduction
+200% delay between basic attacks
Critical strikes deal 50% of base AD
Units critically strike on 150% of attacks
Abilities - 100% increased for Mana and Energy consumption.
Cooldown reduction - 200% Cooldown Inflation on abilities, activated items, and summoner spells.
Tenacity - 50% increased crowd control duration (excluding airborne and suppression).
Movement speed - 225 Movement Speed Reduction.
Attack speed - 200% delay increase on basic attacks.
Critical strike - Critical strikes are modified to deal 50% AD and all champions have 150% critical strike chance.

Will the upper limit of the potential for human competition skyrocket with the introduction of New Ultra Rapid Fire? Can you rise to the resulting challenge? Can a mere man defeat a manatee? When it comes to League of Legends, that last answer is indubitably yes, but no matter. The gauntlet is thrown. Hoist it at thine own risk.""

BY L4T3NCY "Heya guys,

I want to jump in an give a little more design context as to why we moved in the direction we did for New Ultra Rapid Fire this year. We've always mentioned that we want to "improve and innovate" on each mode before it comes back, not just release the same thing. There will always be things that could have been done better, and this way we can tweak and improve them to provide a better experience than the 1st time around.

We heard you guys loud and clear that you didn't want Ultra Rapid Fire on Howling Abyss, so we've kept New Ultra Rapid Fire on Summoner's Rift. SR has more strategic choice designed into it anyway, which is given even more importance in NURF mode.

Positioning in team fights, choosing when to go for objectives (if at all) and minion wave management is crucial. NURF mode punishes mistakes pretty hard (which conveniently ends games quickly and prevents them from dragging on too long). Your League play is going to level up."