Types of Crowd Control

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Crowd Control	Movement	Attacking	Abilities	Interrupt	Spells	Reduction	Removal
Airborne	Blocked	Blocked	Blocked	Yes	Blocked	Partial	with dash/blink
Blind	Allowed	Miss	Allowed	No	Allowed	Yes
Cripple	Allowed	Reduced	Allowed	No	Allowed	Yes
Disarm	Allowed	Blocked	Allowed		Allowed	Yes
Charm /  Flee /  Taunt Forced Action	Blocked	Blocked	Blocked	Yes		Yes
Ground	Partial	Allowed	Partial	See notes		No
Nearsight	Allowed	Allowed	Partial	See notes		No
Root	Blocked	Allowed	Allowed	See notes		Yes
Silence	Allowed	Allowed	Blocked	Yes		Yes
Sleep	Blocked	Blocked	Blocked	Yes		Yes
Slow	Reduced	Allowed	Allowed	No	Allowed	Yes
Stasis	Blocked	Blocked	Blocked	Yes	Blocked	No	None
Stun	Blocked	Blocked	Blocked	Yes		Yes
Suppression	Blocked	Blocked	Blocked	Yes	Blocked	No

Notes

• Movement includes mobility abilities (i.e.  dashes and  blinks, such as Ezreal's Arcane Shift).
  •  Ground does not impede basic movement.
• Attack refers to a champion's basic attacks (by default right-click).
• Ability refers to a champion's castable spells (by default , , , and ).
• Spells refers to summoner spells.
• Interrupt refers to whether or not the effect will cancel channeled abilities.
  •  Roots and  Entangles will not interrupt channeling, with the exception of Teleport and Shen's Stand United.
  •  Roots and  Entangles will interrupt Vi's Vault Breaker and Zac's Elastic Slingshot by virtue of disabling their second casts.
  •  Nearsight prevents the activation of "long ranged" abilities, which seems to include any ability that can input targets via the minimap. By virtue of disabling the second cast,  Nearsight will interrupt Elastic Slingshot. This may be a bug, although it is thematically appropriate for an effect that removes the target's ability to see.
  •  Knockdown and  Ground only interrupt  dash and  blink abilities.
• Crowd control applied by one's self or an ally cannot be countered in any way (neither reduced, resisted, nor removed), with the exception of self-slows.

Airborne

A unit that is made airborne is moved in a specified direction or to a specific point. For the duration, the unit is also stunned and cannot move, attack, cast abilities, activate items or use the summoner spells Flash and Teleport.

Interrupts:	Interrupts all channeled and charged abilities, as well as Anivia's Glacial Storm, all dash abilities and other airborne effects.
Reduction:	Only the stun component duration is reduced by  Tenacity, which stacks multiplicatively. Forced movement's execution time remains unaffected.
Resist:	Resisted by Morgana's Black Shield, Olaf's Ragnarok, Fiora's Riposte and Malzahar's Void Shift, as well as dashes that grant immunity to disables.
Removal:	The forced movement of airborne effects cannot be removed by cleansing effects. However, Quicksilver, Mikael's Crucible, Rengar's Battle Roar, Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will can be used to remove the stun effect. Once the user is able to activate abilities: a dash or blink ability can be used to overrule the airborne. Note that Cleanse, specifically, cannot be used to do this.

To expand upon the countering of airborne effects, consider that the effects are made up of two components: a movement modifier (called a "move block" by Riot, referring to a chunk of code) and a stun (which is responsible for the disabling attacking and casting). As a general rule, the most recent move block will over-rule any previous move blocks, which is how Alistar's Headbutt and Pulverize combo functions. This rule also extends to all beneficial movement modifiers, such as dashes and blinks, which is why Rocket Grab and Rocket Jump will over-rule each other depending on their order of activation. Most beneficial movement modifiers do not prevent the activation of abilities, allowing Tristana to still activate abilities during Rocket Jump but not during Rocket Grab.

• Through the use of cleansing effects or tenacity, players can remove the stun and subsequently activate abilities such as Flash or champion-specific dashes to break the airborne's move block.
  • Note that Cleanse is special-cased to not remove the stunning effects, but is still available to cast. One or the other may be a bug.
• In some instances, the stun duration is longer than the move block (e.g. Sion's Unstoppable Onslaught), but in most cases they are the same duration. There have been cases in the past where the stun duration was shorter, but this usually lead to bug-like interactions and was later "fixed" (e.g. Azir's Emperor's Divide did not apply any stun at all in the initial charge on the ability, which allowed his enemies to use Flash/dash to supersede the charge's knockback and get over the wall).

Knock Aside

• The target is made  airborne in a direction perpendicular from the source.
• Champions with knock aside: Corki, Draven, Urgot (minions and monsters only), Taliyah, Vi.
• Monsters with knock aside: Rift Herald.

Knockback

• The target is made  airborne in a direction directly away from the point of cast.
• Champions with knockback: Aatrox (champions and large monsters), Anivia, Alistar, Aurelion Sol, Azir, Camille, Fizz, Gnar, Gragas, Graves (minions and monsters only), Hecarim, Janna, Jarvan IV, Jayce, Kled, Lee Sin, Maokai, Ornn, Poppy, Quinn, Rammus, Shyvana, Syndra, Sion (minions and monsters only), Taliyah, Thresh, Tristana, Trundle, Vayne, Vel'Koz,  Vi,  Xin Zhao, Yorick, Zac,  Ziggs.
• Monsters with knockback: Baron Nashor, Dragon, Rift Herald.

Knockup

• The target is made  airborne on the spot.
• Champions with knockup: Aatrox, Alistar, Blitzcrank, Braum, Cho'Gath, Fizz, Galio, Ivern, Janna, Jarvan IV, Kalista, Lee Sin, Lulu, Malphite,  Nami,  Nautilus, Ornn, Poppy, Rakan, Rek'Sai,  Riven, Rhaast, Sion, Sejuani,  Taliyah, Vi,  Wukong, Xin Zhao, Yasuo, Zac, Zyra.
• Monsters with knockup: Baron Nashor.

Pull

• The target is made  airborne in a direction toward the point of cast, and in some cases over the point of cast.
• Champions with pull: Aatrox (champions and large monsters), Blitzcrank, Darius, Diana, Kled, Orianna, Nautilus, Pyke, Singed, Sion, Skarner, Syndra (minions and monsters only), Thresh, Urgot, Vi (non-champions only), Viktor, Volibear.
• Monsters with pull: Vilemaw.

Blind

A unit that is blinded will "Miss" their basic attacks, similar to when attacking a target with dodge. Missed attacks will fail to deal damage or apply on-hit effects, with the exception of Volibear's Rolling Thunder and Hecarim's Devastating Charge. Unlike Disarm, Blind does not prevent the unit from declaring attacks. Blind causes Graves' shotgun to fire pellets with a random spread, excluding the direction of his target.

Interrupts:	Does not interrupt any abilities, but will prevent on-hit effects from being triggered. This does not waste the effects, however, and they will simply wait until a successful attack lands.
Reduction:	The duration is reduced by  Tenacity, which stacks multiplicatively.
Resist:	Resisted by Morgana's Black Shield, Olaf's Ragnarok, Fiora's Riposte and Malzahar's Void Shift. Dashes that grant immunity to disables will ignore the effects of Blind for the duration of the dash, but the target will be affected upon landing if the disable duration permits.
Removal:	Removed by Cleanse, Quicksilver, Rengar's Battle Roar, Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will.

• Champions with blind: Teemo.
• Thornmail's passive deals magic damage before the damage is reduced by any effect, including blind. So it still applies if the target is blinded.
• Blinded enemies will only miss if they attack while blinded; ranged units still hit if the projectile fires before the blind.

Cripple

A unit that is crippled has reduced attack speed for the duration.

Interrupts:	Does not interrupt any abilities.
Reduction:	The duration is reduced by  Tenacity, which stacks multiplicatively.
Resist:	Resisted by Highlander, Black Shield, Ragnarok, Riposte and Void Shift. Dashes that grant immunity to disables will ignore the effects of Slow for the duration of the dash, but the target will be affected upon landing if the disable duration permits.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Shadow Step (as Shadow Assassin), Decisive Strike, Highlander, Battle Roar, Ragnarok, Remove Scurvy and Unbreakable Will.

• Champions with cripple: Fiora, Malphite, Nasus
• Items with cripple: Frozen Heart, Randuin's Omen, Thornmail, Warden's Mail

Disarm

A unit that is disarmed is unable to declare basic attacks.

Interrupts:	Interrupts Lucian's The Culling, but no other abilities.
Reduction:	The duration is reduced by Tenacity, which stacks multiplicatively.
Resist:	Resisted by Morgana's Black Shield, Olaf's Ragnarok, Fiora's Riposte and Malzahar's Void Shift. Dashes that grant immunity to disables will ignore the effects of Disarm for the duration of the dash, but the target will be affected upon landing if the disable duration permits.
Removal:	Removed by Cleanse, Quicksilver, Rengar's Battle Roar, Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will.

• Champions with disarm:  Kai'Sa (self), Kennen (self), Quinn (non-champions only).
  • Reloading is mechanically similar to being disarmed, which is featured on Graves and Jhin.

The following crowd control types combine Disarm with another crowd control type:

•  Entangle
  • Champions with entangle: Amumu.
•  Pacify
  • Champions with pacify: Aatrox (self), Kayn (self), Lulu (also polymorphs the target), Vi (self),  Warwick (self), Varus (self), Xerath (self).

Disrupt

A unit that is disrupted has their channeled and charged abilities interrupted. Unlike  Silence, the unit can still cast abilities.

Interrupts:	Interrupts all channeled and all charged abilities with the exception of Lucian's The Culling. It will also interrupt Anivia's Glacial Storm.
Reduction:	The effect is instantaneous. There is nothing to reduce.
Resist:	Resisted by Morgana's Black Shield, Zac's Let's Bounce!, Olaf's Ragnarok, Fiora's Riposte, Malzahar's Void Shift and  Unstoppable units.
Removal:	The effect is instantaneous. There is nothing to remove.

• Champions with disrupt: Kassadin, Viktor, Camille.

Forced action

Charm

For the item, see Faerie Charm

A unit that is charmed will move toward the source for the duration, during which time they cannot control their own movement or attacks, and cannot cast abilities, activate items or use the summoner spells Flash and Teleport.

Interrupts:	Interrupts all channeled and charged abilities, as well as Anivia's Glacial Storm. It will also interrupt Rakan's Grand Entrance and Battle Dance, Yasuo's Sweeping Blade and prevent Gnar's Hop from bouncing.
Reduction:	The duration is reduced by  Tenacity, which stacks multiplicatively.
Resist:	Resisted by Morgana's Black Shield, Ragnarok, Fiora's Riposte and Malzahar's Void Shift. Dashes that grant immunity to disables will ignore the effects of Charm for the duration of the dash, but the target will be affected upon landing if the disable duration permits. The slow is also resisted by Master Yi's Highlander.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Rengar's Battle Roar, Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will. Also removed when the champion who initiated the charm effect dies.

• Champions with charm: Ahri, Evelynn, Rakan.

Fear / flee

A unit that is fleeing will move directly away from the source, during which time they cannot control their own movement or attacks, and cannot cast abilities, activate items or use the summoner spells Flash and Teleport. Versus non-champions, flee instead causes the target to move around aimlessly or stand immobilized.

Interrupts:	Interrupts all channeled and charged abilities, as well as Glacial Storm. It will also interrupt Sweeping Blade and prevent Hop from bouncing.
Reduction:	The duration is reduced by  Tenacity, which stacks multiplicatively.
Resist:	Resisted by Black Shield, Ragnarok, Riposte and Void Shift. Dashes that grant immunity to disables will ignore the effects of Flee for the duration of the dash, but the target will be affected upon landing if the disable duration permits. The slow is also resisted by Highlander.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Battle Roar, Ragnarok, Remove Scurvy and Unbreakable Will. Also removed when the champion who initiated the fear/flee effect dies.

• Champions with flee: Aatrox (minions only), Darius (minions and monsters only), Fiddlesticks, Hecarim, Nocturne, Shaco, Urgot, Volibear (minions and monsters only), Warwick.
  • Uniquely to Volibear, fear slows the target by 100% which causes it to stay in place and turn around aimlessly instead of away from the source.

Taunt

A unit that is taunted will attempt to attack the source for the duration, during which time they cannot control their own movement or attacks, and cannot cast abilities, activate item or use the summoner spells Flash and Teleport.

Interrupts:	Interrupts all channeled and charged abilities, as well as Anivia's Glacial Storm. It will also interrupt Rakan's Grand Entrance and Battle Dance, Yasuo's Sweeping Blade and prevent Gnar's Hop from bouncing.
Reduction:	The duration is reduced by  Tenacity, which stacks multiplicatively.
Resist:	Resisted by Morgana's Black Shield, Olaf's Ragnarok, Fiora's Riposte and Malzahar's Void Shift. Dashes that grant immunity to disables will ignore the effects of Taunt for the duration of the dash, but the target will be affected upon landing if the disable duration permits. The slow is also resisted by Master Yi's Highlander.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Rengar's Battle Roar, Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will.

• Champions with taunt: Shen, Rammus, Galio.

Ground

A unit that is grounded is unable to activate mobility spells - i.e. all dash and blink abilities. The effect does not innately  knockdown a target that is already performing a dash or blink.

Interrupts:	Interrupts channeled and charged dashes, namely Stand United, Vault Breaker, Crowstorm, Elastic Slingshot, and Teleport, and will also prevent Hop from bouncing. Probable Bug: Does not interrupt Recall.
Reduction:	The only examples of Ground are persistent area of effects, which continually refresh.
Resist:	Resisted by Black Shield, Ragnarok, Riposte and Void Shift, as well as dashes that grant immunity to disables.
Removal:	The only example of Ground is a persistent area of effect, which continually refresh. Olaf's Ragnarok is the only ability that both removes crowd control and grants immunity to subsequent effects.

• Champions with ground: Cassiopeia, Galio (self), Poppy, Singed.

Knockdown

Knockdown only affects units that are Airborne or are performing a dash. A unit that is knocked down is placed on the ground. Knockdown will not trigger Yasuo's Last Breath.

Interrupts:	Interrupts dash abilities and airborne effects.
Reduction:	The effect is instantaneous. There is nothing to reduce.
Resist:	Resisted by Black Shield, Ragnarok, Riposte and Void Shift, as well as dashes that grant immunity to disables.
Removal:	The effect is instantaneous. There is nothing to remove.

• Champions with knockdown: Camille, Jinx, Lissandra, Malzahar, Poppy, Sejuani, Veigar, Viktor.

Nearsight

A unit that is nearsighted has their  sight radius reduced by 900 and loses their allied vision (i.e. their ability to see what their allies see). In addition, being nearsighted will prevent Shen from casting Stand United using the portrait icons - requiring him to have personal vision of his target.

Interrupts:	Interrupts attack commands if the nearsighted unit's target is outside of the target's new vision area and prevents automated target acquisition.
Reduction:	The duration is not reduced by crowd control reduction.
Resist:	Not resisted by any form for crowd control immunity.
Removal:	The effect is removed by Quicksilver, but no other forms of crowd control removal.

• Champions with nearsight: Graves, Nocturne, Quinn

Silence

A unit that is silenced cannot cast abilities, activate items or use the summoner spells Flash and Teleport for the duration.

Interrupts:	Interrupts all channeled and all charged abilities with the exception of The Culling. It will also interrupt Glacial Storm.
Reduction:	The duration is reduced by Tenacity, which stacks multiplicatively.
Resist:	Resisted by Black Shield, Ragnarok, Riposte and Void Shift. Dashes that grant immunity to disables will ignore the effects of Silence for the duration of the dash, but the target will be affected upon landing if the disable duration permits.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Battle Roar, Ragnarok, Remove Scurvy and Unbreakable Will.

• Champions with silence: Blitzcrank, Cho'Gath, Fiddlesticks, Garen, Malzahar, Soraka, Rumble (self).

Sleep

A unit that is asleep is unable to control its movement, declare attacks, cast abilities, activate items or use the summoner spells Flash and Teleport for the duration, as with  stun. The duration is substantially longer than other crowd control effects, but will be interrupted if the target takes damage.

Interrupts:	Falling asleep interrupts all channeled and charged abilities, as well as Anivia's Glacial Storm. Drowzy does not interrupt any actions.
Reduction:	Sleep is reduced by Tenacity, which stacks multiplicatively. The duration of drowzy cannot be reduced.
Resist:	Both effects are resisted by Olaf's Ragnarok, Fiora's Riposte and Malzahar's Void Shift, as well as dashes that grant immunity to disables. Morgana's Black Shield can only resist becoming Drowzy, and will not prevent already-Drowzy targets from falling asleep.
Removal:	Both Sleep and Drowzy can be removed by Cleanse, Quicksilver, Mikael's Crucible, Rengar's Battle Roar, Olaf's Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will.

• Champions with sleep: Zoe.

Slow

A unit that is slowed has reduced movement speed for the duration. Slow percentages cannot reduce a target below 110  movement speed.

Interrupts:	Does not interrupt any abilities.
Reduction:	The duration is reduced by Tenacity, which stacks multiplicatively. The strength is reduced by Slow resist, which stacks additively.
Resist:	Resisted by Highlander, Black Shield, Ragnarok, Riposte and Void Shift. Dashes that grant immunity to disables will ignore the effects of Slow for the duration of the dash, but the target will be affected upon landing if the disable duration permits.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Shadow Step (as Shadow Assassin), Decisive Strike, Highlander, Battle Roar, Ragnarok, Remove Scurvy and Unbreakable Will.

• Champions with slow: Aatrox, Ahri, Akali, Anivia, Ashe, Aurelion Sol, Azir, Bard, Braum, Caitlyn, Camille, Cassiopeia, Cho'Gath, Corki, Darius, Diana, Draven , Dr. Mundo, Ekko, Evelynn, Fiddlesticks, Fiora, Fizz, Galio, Gangplank, Gnar, Gragas, Graves, Hecarim, Heimerdinger, Illaoi, Irelia, Ivern, Janna, Jarvan IV, Jayce, Jhin, Jinx, Kalista, Karma, Karthus, Kassadin, Kayle, Kayn, Kha'Zix, Kindred, Kled, Kog'Maw, LeBlanc, Lee Sin, Leona, Lissandra, Lulu, Lux, Malphite, Maokai, Miss Fortune, Morgana,  Nami,  Nasus,  Nautilus, Nocturne, Nunu, Olaf, Orianna, Ornn, Poppy, Pyke, Quinn, Rakan, Rammus, Rengar, Rumble, Sejuani, Shaco, Singed, Sion, Skarner, Sona, Soraka, Swain, Sylas, Syndra, Tahm Kench, Taliyah, Talon, Teemo, Thresh, Tristana, Trundle, Tryndamere, Twisted Fate, Twitch, Urgot, Varus, Vel'Koz, Viktor, Vladimir, Volibear, Warwick, Xerath, Xin Zhao, Yorick, Yuumi, Zac, Zed, Ziggs, Zilean, Zoe, Zyra.
  • Galio and Shaco are the only ones who can reduce movement speed below 110, to 60 and 100 respectively. This movement speed is set and cannot be modified, but it can be cleansed by slow immunity.
• Items with slow: Bilgewater Cutlass, Blade of the Ruined King, Timeworn Face of the Mountain,  Frozen Mallet, Hextech Gunblade, Hextech GLP-800, Iceborn Gauntlet, Randuin's Omen, Righteous Glory, Rylai's Crystal Scepter, Timeworn Frost Queen's Claim, Twin Shadows, Zeke's Convergence.
• Monsters with slow: Baron Nashor, Ocean Drake.
• Summoner Spells with slow: Chilling Smite, Exhaust.
• Runes with slow: Glacial Augment.

Snare/Root

A unit that is rooted is unable to control its movement for the duration. Moving covers movement commands, as well as all dash and blink abilities - including Flash and Teleport.

Interrupts:	Interrupts Rakan's Grand Entrance and Battle Dance, Shen's Stand United, Vi's Vault Breaker, Yasuo's Sweeping Blade Zac's Elastic Slingshot and Teleport, and will prevent Gnar's Hop from bouncing.
Reduction:	The duration is reduced by  Tenacity, which stacks multiplicatively.
Resist:	Resisted by Morgana's Black Shield, Olaf's Ragnarok, Fiora's Riposte and Malzahar's Void Shift. Dashes that grant immunity to disables will ignore the effects of Root for the duration of the dash, but the target will be affected upon landing if the disable duration permits.
Removal:	Removed by Cleanse, Quicksilver, Mikael's Crucible, Rengar's Battle Roar, Ragnarok, Gangplank's Remove Scurvy and Alistar's Unbreakable Will.

• Champions with root: Caitlyn, Ivern, Jhin, Jinx, Karma, LeBlanc, Lee Sin, Leona, Lissandra, Lux, Maokai, Morgana, Nautilus, Neeko, Nunu, Rengar, Ryze, Singed, Skarner, Soraka, Swain, Varus, Xayah, Yuumi, Zac, Zyra.