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Lab of Legends is a single-player campaign-style lab where the player's deck grows as they progress through a linear series of levels. It bears some similarities to roguelike[1] games. The player chooses from several starting decks and special abilities and acquires more abilities, cards and buffs to add to their deck as they defeat levels.
Description[]
Choose a
champion and challenge a gauntlet of increasingly powerful foes! The player will face nine AI decks, including three bosses. Victories will earn them rewards that increase the strength of their cards. Achieve a total victory with a champion to earn a unique icon.
Before a "run" (or campaign) the player selects one of several Starting Decks, each of which is themed after a champion. In each run the player goes through a linear series of stages.
The player's ![]()
nexus starts each run with 30 health. At the beginning of each stage the nexus has the same health it had at the end of the previous stage. There is a exception, though: the health of the nexus is restored back to full after defeating a boss (see Stages). If the player's nexus reaches 0, they lose and have to start the challenge from the beginning if they want to play again. The player can retire the run at any time.
When the player defeats the final boss they win the run and collect any rewards available. At this point the next level of difficulty becomes available for the champion with which the player won the run with. This is indicated in the main screen of the lab with a checkmark on the champion and difficulty the run was completed on.
Difficulty[]
Players can choose between Normal (default), Hard, Heroic, and Legendary levels of difficulty. Completing a run with a champion on a difficulty level unlocks the next difficulty level for that champion. Each difficulty level includes all the challenges of the previous difficulty level plus some added ones:
- Hard: The enemy starts with +5 maximum nexus health. Champions get items of their own. (See Hard Difficulty column in Stages.)
- Heroic: Some enemy followers have items. The enemy summons reinforcements at the start of the game. (See Heroic Difficulty column in Stages.)
- Legendary: The enemy refills its spell mana at Round Start.
Starting Decks[]
Code: CEAACCIDBEHSMVKWLRPNOAOZAHOACAA
- Champions
3Aphelios (x2)
- Followers
2 Lunari Shadestalker (x2)
2 Mountain Goat (x2)
1 Spacey Sketcher (x2)
4 The Cloven Way (x2)
4 Whiteflame Protector (x2)
- Spells
2 Behold the Infinite (x2)
2 Gifts From Beyond (x2)
2 Hush (x2)
Code: CEAACCIEA4AQGBAFDI4TU2LNAA
- Champions
3Azir (x2)
- Followers
2 Aspiring Chronomancer (x2)
1 Bloodthirsty Marauder (x2)
1 Dunekeeper (x2)
6 Inspiring Marshal (x2)
4 Sandcrafter (x2)
- Landmarks
5 Sandswept Tomb (x2)
- Spells
3 Quicksand (x2)
3 Weight of Judgment (x2)
Code: CEAACCIBAECASCYUCYNBWLJOAA
- Champions
4Braum (x2)
- Followers
6 Alpha Wildclaw (x2)
4 Bull Elnuk (x2)
2 Icevale Archer (x2)
1 Omen Hawk (x2)
3 Scarthane Steffen (x2)
- Spells
4 Avalanche (x2)
1 Elixir of Iron (x2)
3 Take Heart (x2)
Code: CEAACCICAYDAQDQSCQMCMKZOAA
- Champions
1Fizz (x2)
- Followers
2 Coral Creatures (x2)
4 Mystifying Magician (x2)
3 Petty Officer (x2)
4 Zap Sprayfin (x2)
- Spells
3 Double Trouble (x2)
1 Parrrley (x2)
2 Pick a Card (x2)
0 Warning Shot (x2)
Code: CEAAEAICAUDAQAIFAQGBEFJHFAVDMAA
- Champions
6Hecarim (x2)
- Followers
2 Arachnoid Horror (x2)
1 Barkbeast (x2)
3 Darkwater Scourge (x2)
1 Oblivious Islander (x2)
3 Scribe of Sorrows (x2)
2 Shark Chariot (x2)
- Spells
5 Grasp of the Undying (x2)
2 Vile Feast (x2)
Code: CEAACCIBAQERAGZHFM2DQOJ2AA
- Champions
5Heimerdinger (x2)
- Followers
3 Amateur Aeronaut (x2)
2 Chempunk Pickpocket (x2)
4 Chump Whump (x2)
- Spells
3 Flash of Brilliance (x2)
3 Get Excited! (x2)
2 Mystic Shot (x2)
2 Scrapdash Assembly (x2)
0 Thermogenic Beam (x2)
Code: CEAAGAICAICQIAICAYLSUNAEAQBAIBIJBMAA
- Champions
3Irelia (x2)
- Followers
5 Blossoming Blade (x2)
2 Greenglade Duo (x2)
5 Jeweled Protector (x2)
2 Navori Highwayman (x2)
2 Ribbon Dancer (x2)
1 Sparring Student (x2)
- Spells
4 Concussive Palm (x2)
2 Lead and Follow (x2)
Code: CEAAGAIDAEFQGAIBBMGDEBIEAEAQKBQJBIAA
- Champions
3Lissandra (x2)
- Followers
5 Draklorn Inquisitor (x2)
2 Icevale Archer (x2)
3 Kindly Tavernkeeper (x2)
8 Uzgar the Ancient (x2)
- Landmarks
1 Frozen Thrall (x2)
- Spells
5 Catalyst of Aeons (x2)
3 Ice Shard (x2)
1 Three Sisters (x2)
Code: CEAAEBADAIBAGCQRAUAQEAQGBQODAAA
- Champions
3Lulu (x2)
- Followers
4 Fae Guide (x2)
2 Greenglade Duo (x2)
1 Pix! (x2)
3 Scaled Snapper (x2)
2 Young Witch (x2)
5 Yusari (x2)
- Spells
2 Twin Disciplines (x2)
4 Will of Ionia (x2)
Code: CEAACCIBAACBEFQ2DQQCMJZLAA
- Champions
1Lucian (x2)
- Followers
1 Cithria of Cloudfield (x2)
3 Senna, Sentinel of Light (x2)
4 Silverwing Vanguard (x2)
5 Vanguard Cavalry (x2)
2 War Chefs (x2)
- Spells
3 Prismatic Barrier (x2)
1 Radiant Strike (x2)
2 Single Combat (x2)
Code: CEAACCIEBEBAGBAFA4EASCQOAA
- Champions
7Malphite (x2)
- Followers
2 Blue Sentinel (x2)
1 Chip (x2)
4 Earth Elemental (x2)
6 Stonebreaker (x2)
- Landmarks
5 Eye of the Ra-Horak (x2)
3 Spiral Stairs (x2)
2 Startipped Peak (x2)
- Spells
4 Ground Slam (x2)
Code: CEAACCICAYCQ2FIWDEWTAOR6AA
- Champions
3Miss Fortune (x2)
- Followers
2 Hired Gun (x2)
4 Island Navigator (x2)
1 Jagged Butcher (x2)
1 Prowling Cutthroat (x2)
5 Razorscale Hunter (x2)
- Spells
4 Chum the Waters (x2)
1 Jailbreak (x2)
2 Make it Rain (x2)
Code: CIAAEBACAYEA2GJ4AUCAMAIDAQCQ6AA
- Champions
5Pyke (x2)
- Followers
1 Crackshot Corsair (x2)
3 Petty Officer (x2)
1 Prowling Cutthroat (x2)
2 Redfin Hammersnout (x2)
1 Sharkling (x2)
2 Snapjaw Swarm (x2)
- Spells
1 Bloodbait (x2)
4 Chum the Waters (x2)
Code: CMAACCIEA4AQWEYWIRCUUU3NAA
- Champions
3Rek'Sai (x2)
- Followers
2 Aspiring Chronomancer (x2)
3 Xenotype Researchers (x2)
3 Xer'sai Caller (x2)
6 Xer'sai Dunebreaker (x2)
1 Xer'sai Hatchling (x2)
- Spells
0 Feral Prescience (x2)
3 Quicksand (x2)
2 Ruthless Predator (x2)
Code: CEAAGAICAMCQIAYDAEBQMBYEAEBQICYRFEAA
- Champions
3Riven (x2)
- Followers
1 Blade Squire (x2)
3 Iron Ballista (x2)
2 Legion Drummer (x2)
2 Runeweaver (x2)
5 Trifarian Shieldbreaker (x2)
- Spells
3 Culling Strike (x2)
2 Weapon Hilt (x2)
3 Whirling Death (x2)
Code: CEAAGAICAABQCBAAAYDQGAACAMCQMCALBUAA
- Champions
4Shyvana (x2)
- Followers
2 Dragonguard Lieutenant (x2)
6 Dragonguard Lookout (x2)
2 Egghead Researcher (x2)
3 Loyal Badgerbear (x2)
5 Screeching Dragon (x2)
7 Stalking Broodmother (x2)
- Spells
1 Battlefield Prowess (x2)
3 Strafing Strike (x2)
Code: CEAAGAIDAMIQIAIDCESSQKYEAIBQKBQHBAAA
- Champions
5Swain (x2)
- Followers
7 Basilisk Bloodseeker (x2)
4 Citybreaker (x2)
3 Iron Ballista (x2)
2 Legion Drummer (x2)
2 Legion Grenadier (x2)
1 Legion Saboteur (x2)
- Spells
1 Blade's Edge (x2)
3 Death's Hand (x2)
Code: CEAACCIEA4OCKJRKFREVSXLYAA
- Champions
5Taliyah (x2)
- Followers
2 Clockwork Curator (x2)
4 Desert Naturalist (x2)
2 Rock Hopper (x2)
- Landmarks
1 Ancient Preparations (x2)
2 Hibernating Rockbear (x2)
- Spells
1 Imagined Possibilities (x2)
1 Shaped Stone (x2)
3 Unraveled Earth (x2)
Code: CEAACCIEA4AQWDIVE44E6Z3WAA
- Champions
2Zilean (x2)
- Followers
2 Aspiring Chronomancer (x2)
5 Khahiri the Returned (x2)
3 Merciless Hunter (x2)
4 Profiteer (x2)
3 Xenotype Researchers (x2)
- Landmarks
2 Preservarium (x2)
- Spells
1 Scrying Sands (x2)
2 Waking Sands (x2)
Stages[]
Enemy decks are themed after the card shown in the preview of each stage. In each stage the enemy has a Passive Power that fits the theme of its deck - these powers have specified rarities. There are six normal stages and three boss stages. The decks in the boss stages include champions, while the decks in the normal stages don't.
In normal difficulty the enemy nexus has 10 health in the first three stages, 20 health in stages 4-6 and 30 health in stages 7-9.
| Name | Regions | Power name and icon | Power description | Power rarity | Reward | Hard Diffuculty | Heroic Difficulty |
|---|---|---|---|---|---|---|---|
![]() Spiders |
![]() Spiders Everywhere |
Round Start: Create a |
Support Champion Pack | N/A |
| ||
![]() Mistwraiths |
![]() Dead Rise |
When an ally |
|
N/A |
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![]() Thresh (Boss) |
![]() Damnation |
|
|
Thresh has Doran's Blade. |
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![]() Hunters |
![]() Frozen Earth |
Round Start: Give the |
|
N/A |
| ||
![]() Scars |
![]() Proving Grounds |
Start with |
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N/A |
| ||
![]() Sejuani (Boss) |
![]() Endure |
|
|
Sejuani has
Sterak's Gage. |
| ||
![]() Foundry |
![]() Working Overtime |
Start with |
Reinforcements (1) - Card in deck | N/A |
| ||
![]() Guard Bots |
![]() Iterative Enhancements |
Round Start: Summon a Turret, with increased costs per round, starting at 0 and capped at 8. | Reinforcements (1) - Card in deck | N/A |
| ||
![]() Viktor (Boss) |
![]() Beyond Mere Flesh |
|
Unique Icon | Viktor has The Brutalizer. |
|
Special Buffs[]
Passive Powers[]
Passive powers are abilities applied to the player's ![]()
Nexus. At the start of the run and after defeating Thresh and Sejuani, the player can choose one power from three
randomly selected from the pool below. The higher the rarity of a power, the less likely it is that it is offered to the player. Unique passive powers can be obtained more than once in a run, and their effects stack.
Rerolling powers at the start of a run does not consume the player's rerolls.
| Name | Rarity | Description | Notes | |
|---|---|---|---|---|
![]() Advanced Preparations |
Start of Game: Create an Ally landmark completion effects activate twice. |
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![]() Battlefield Training |
Round Start: Grant the |
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||
![]() Black Market Discount |
Round End: Reduce the cost of your most expensive card in hand by 1. | |||
![]() Bouncing Blades |
Round Start: Create a |
|||
![]() Can't Stop; Won't Stop |
Allies' buffs (except |
| ||
![]() Clock Setter |
Start of Game: Create 4 |
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Counterfeit Production |
Round Start: Create a |
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![]() Crush |
Allies have |
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![]() Domination |
Round Start: |
|||
![]() Dragon's Rage |
When you summon a unit, grant it |
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![]() Duelist |
When you summon an ally, give it |
|||
![]() Empty Mind |
When your hand is empty, |
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![]() Endurance |
When an ally survives damage, grant it +1|+1. | |||
![]() Enfeebling Strike |
When you damage an enemy, reduce its Power by the damage dealt. |
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![]() Evolution |
Allies have +1|+1 for each keyword they have. | |||
![]() Fast Deal |
Round Start: Draw 1 and give it |
|||
Feral Senses |
Round Start: Create a |
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![]() Flexible Gameplan |
Start of Game: Draw 2. | |||
![]() Grit |
Allies have " |
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![]() Higher Education |
When you draw a card, give allies +1|+0 this round. | |||
![]() Hold Them Off |
Round Start: |
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![]() Immortality |
Start of Game: Heal your Nexus 10. | |||
Lie in Wait |
Allies Everywhere that cost 3 or less are Lurkers and have |
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![]() Lil' Buddies |
Round Start: Summon 1 random 1-cost Poro. |
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![]() Manaflow |
Start of Game: Get an empty |
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![]() Nature's Revenge |
When you gain the |
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![]() New Student |
Start of Game: Summon |
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![]() Out the Gates |
Start of Game: Summon a 2-cost unit from your deck. | |||
![]() Raiding Party |
When you damage the enemy nexus, grant the top ally in your deck +1|+1 | |||
![]() Rockbear Den |
Start of Game: Summon a When an ally landmark counts down to 0, create a |
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![]() Rush Them Down |
When you summon an ally, give it +1|+1 this round. | |||
![]() Seat of Power |
Start of Game: Summon |
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![]() Share the Bounty |
When you target an ally with a single-target spell, copy it on your |
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![]() Sharing is Caring |
When you summon an ally, grant its keywords to all allies. |
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![]() Slow But Steady |
When you cast a |
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![]() Sorcery |
Round Start: Refill your |
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![]() Spellslinger |
Your spells cost 1 less. | |||
![]() Terraforming |
Start of Game: Summon a random landmark from your deck | |||
![]() The Best Defense... |
Allies have " |
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![]() Thieves' Tools |
When allies attack, |
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![]() Trifarian Might |
When you summon a 5+ power unit, it |
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![]() Vanguard Lookout |
Start of Game: Summon 2 |
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![]() Welcome Gifts |
When you summon an ally, grant it a random keyword. | |||
![]() Wild Inspiration |
Your created cards cost 1 less. | |||
![]() Yipp's Genius |
When you summon a 1 cost unit, grant it +2|+2. |
|
Support Champion Pack[]
The player can add a champion pack to their deck. The choices presented are three packs randomly selected from the list below. Each pack includes two copies of the listed cards.
5Gangplank,
0 Warning Shot,
3 Monkey Idol
4Tahm Kench,
2 Fortune Croaker,
3 Bayou Brunch
4Twisted Fate,
3 Slotbot,
3 Pilfered Goods
Reinforcements[]
Reinforcements will allow the player to add copies of one from a selection of three cards to their deck. These cards can also be ones that already exist in the player's deck. The cards chosen are entirely random and will not take into account what's best for the deck they have.
Later in the lab the player also get the choice of selecting cards with items attached to them, or adding items to cards already in their deck. Like with passive powers, the rarity will affect the likelihood of receiving the item. The item given to the card will also be completely random and will not necessarily synergize for the card it's applied to.
Champion Item[]
The player be given the choice of one of three items to grant to one champion of their choosing. This can include champions added by reinforcements or the support champion pack. They'll also gain an additional copy of that champion.
Items[]
Items are buffs granted to all copies of one selected card. There is no limit to the number of items a card can have. When a card has an item, a small hexagonal icon will appear on the card in the deck preview to the left outside of matches with a number indicating the number of items it has. Some items are exclusive to spells or units.
| Name | Rarity | Unit | Spell | Landmark | Description |
|---|---|---|---|---|---|
![]() Ancient Coin |
Yes | -1 cost | |||
![]() Archangel's Staff |
Yes | When I'm summoned, refill your mana equal to my cost. | |||
![]() Avarice Blade |
Yes | ||||
![]() Banshee's Veil |
Yes | ||||
![]() Chain Vest |
Yes | ||||
![]() Chalice of Harmony |
Yes | Yes | -3 cost | ||
![]() Doran's Blade |
Yes | +1|+1 | |||
![]() Elixir of Skill |
Yes | Yes | When cast, | ||
![]() Elixir of Sorcery |
Yes | When cast, cast me again onto the same targets. | |||
![]() Farsight Alteration |
Start of Game: Draw me if I'm not in your hand. | ||||
![]() Frozen Mallet |
Yes | +4|+4, but costs 2 more mana. | |||
![]() Giant's Belt |
Yes | +0|+2 | |||
![]() Health Potion |
Yes | Yes | When cast, heal you | ||
![]() Hunter's Machete |
Yes | ||||
![]() Lich Bane |
Yes | When you cast a spell, grant me +1|+1. | |||
![]() Locket of the Iron Solari |
Yes | ||||
![]() Mana Potion |
Yes | -1 cost | |||
![]() Ninja Tabi |
Yes | ||||
![]() Nomad's Medallion |
Yes | -2 cost | |||
![]() Pickaxe |
Yes | +2|+0 | |||
![]() Phage |
Yes | +2|+2 | |||
![]() Phantom Dancer |
Yes | ||||
![]() Philosopher's Stone |
Yes | When I'm summoned, draw 1. | |||
![]() Poro Snax |
Yes | Yes | When cast, summon a | ||
![]() Skirmisher's Sabre |
Yes | ||||
![]() Spellbinder |
Yes | When you cast a spell, reduce my cost by 1. Actual Effect: When an allied | |||
![]() Spirit of the Spectral Wraith |
Yes | +3|+3, but | |||
![]() Spirit Stone |
Yes | When I'm summoned, create a fleeting copy of me. | |||
![]() Stark's Fervor |
Yes | ||||
![]() Sterak's Gage |
Yes | ||||
![]() Tear of the Goddess |
Yes | Yes | -2 cost | ||
![]() Twin Shadows |
Yes | When I'm summoned, summon an | |||
![]() The Brutalizer |
Yes | ||||
![]() Warmog's Armor |
Yes | ||||
![]() Wooglet's Witchcap |
Yes | When cast, shuffle 2 copies of me into your deck. They cost 1. | |||
![]() Golden Spatula |
Yes | "It must do something..." Actual Effect: When I'm summoned, grant me +1|+1 and a | |||
![]() Zz'rot Portal |
Yes | When I'm summoned, summon a copy of me. |
- Golden Spatula
- Farsight Alteration
Bad items. These items can be shown in Dreg Dredgers events. They offer cheap cards but with bad items. These includes
- Common Expired Mana Potion: +1 mana cost.
- Rusty Sword Common -1/0.
- Cursed Stone Rare Fleeting.
Rewards[]
After the player's first win on Normal difficulty with each champion, they will be awarded with one icon based on their champion.
After winning once with each of
1Fizz,
3Irelia,
3Lissandra,
7Malphite and
2Zilean, they will be awarded with a Malphite Cardback.

Shard of the Monolith
Development[]
| “ |
|
| “ | We’re going to keep exploring incremental improvements to the existing Lab ... Stay tuned for another major step forward coming in the next few months. We’re on a journey with a clear goal: we want to create a permanent experience that players can keep coming back to for years to come. |
| — | |
- Lab of Legends was considered successful internally, and for new and returning players.[2]
- At the time, Lab of Legends was the Lab that had been in the game for the longest time, in consecutive patches or otherwise.
- Due to its success, it was decided to give Lab of Legends gradual improvements over its lifespan.
- The stated eventual goal is to create a more permanent PvP experience.
Trivia[]
- Viktor (Boss)'s passive power, Beyond Mere Flesh, is functionally identical to the obtainable power, Evolution.
Change Log[]
| General | |
|---|---|
| V2.9 |
Undocumented:
|
| V2.5 |
Undocumented:
|
| V2.1 |
|
| Champions | |
|---|---|
| V2.9 |
|
| V2.5 |
Undocumented:
|
| V2.1 |
|
| Rewards | |
|---|---|
| V2.9 |
Undocumented:
|
| V2.5 |
Undocumented:
|
| V2.1 |
|
- ↑ Experimenting With Labs - "We wanted to see if there might be some promise in a more roguelike LoR experience."
- ↑ Experimenting With Labs















































































































































