Crowd control (CC) is the term used to describe an ability or spell that temporarily reduces a unit's ability to fight. The term 'crowd control' comes from the ability to control the enemy team during fights, by either restricting their contribution or means to escape. In addition, the use of crowd control can aid in your own survivability: in the same way you can stop them from escaping, you can stop them from following.

Crowd control does not make an enemy untargetable. In the case of Airborne effects, the target is considered to be on the ground for the purposes of skill shots and area of effect damage (such as  Morgana's  Tormented Soil).

Types of Crowd Control

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The following are the current forms of crowd control that exist within League of Legends:

• Airborne: A unit that is airborne is unable to control its movement, attack or cast abilities for the duration. The duration is also unaffected by crowd control reduction and cannot be removed by cleansing effects.
  • Knockback: A knockback causes the target to be made airborne in a direction away from the point of cast.The duration depends on how far the target travels, from 0.75 seconds ( Rammus's  Powerball) to 1.5 ( Lulu's  Wild Growth).
  • Knockup: A knockup causes the target to be made airborne on the spot. The duration depends on how high is the target thrown into the air, from 0.75 seconds ( Rammus's  Powerball) to 1.5 ( Lulu's  Wild Growth).
  • Pull/Fling: A pull effect causes the target to be made airborne in a direction toward the point of cast.
• Blind: A unit that is blind will miss its auto-attacks for the duration. Miss occurs on-hit, and does not prevent attacks from being declared.
• Disarm: A unit that is disarmed cannot declare attacks for the duration. There are currently no examples of Disarm as a standalone crowd control type.
  • Entangle is a combination of Disarm and Root.
  • Polymorph is a combination of Disarm and Silence (aka Pacify). The only example also reduces movement speed for the duration.
• Forced Action: A unit that is under the effect of a forced action cannot control its own movement or attacks, and is unable to cast abilities.
  • Charm: A unit that is charmed will move toward the source for the duration.
  • Fear: A unit that is feared move around randomly at reduced movement speed for the duration. There are currently no examples of Fear that affect champions.
  • Flee: A unit that is fleeing will move directly away from the source with reduced movement speed for the duration.^[1]
  • Taunt: A unit that is taunted will attempt to attack the source of the taunt for the duration.
• Root: A unit that is rooted is unable to control its movement for the duration (occasionally referred to as a Snare).
• Silence: A unit that is silenced cannot cast abilities or activate items for the duration.
• Slow: A unit that is slowed has reduced movement and/or attack speed for the duration.
• Stun: A unit that is stunned is unable to move, attack or cast abilities for the duration.
  • Suspended: A unit that is suspended is considered to be airborne for the purposes of  Last Breath, but for countering purposes it's considered a stun.
• Suppression: A unit that is suppressed is unable to control its movement, attack, cast abilities or use spells (including Cleanse). The duration is also unaffected by crowd control reduction.

Summary Table

Crowd Control	Movement	Attacking	Abilities	Interrupt	Forbidden Spells	Reduction	Removal
Airborne	Blocked	Blocked	Blocked	Yes		No	See article
Blind	Allowed	Miss	Allowed	No	None	Yes
Entangle	Blocked	Blocked	Allowed	See notes		Yes
Forced Action	Blocked	Blocked	Blocked	Yes		Yes
Polymorph	Reduced	Blocked	Blocked	Yes		Yes
Root	Blocked	Allowed	Allowed	See notes		Yes
Silence	Allowed	Allowed	Blocked	Yes	All	Yes
Slow	Reduced	Allowed	Allowed	No	None	Yes
Stun	Blocked	Blocked	Blocked	Yes		Yes
Suspension	Blocked	Blocked	Blocked	Yes		Yes
Suppression	Blocked	Blocked	Blocked	Yes	All	No

Please note the following:

• Movement includes abilities (such as  Ezreal's  Arcane Shift, Flash and Teleport).
• Ability refers to a champion's castable spells (by default Q, W, E and R).
  • Mikael's Crucible cannot be activated where Abilities are disabled, as the item is intended to be used on allies.
• Spells refers to the Summoner Spells.
• Interrupt refers to whether or not the effect will cancel channeled abilities.
  • Contrary to popular belief, Roots and Entangles will NOT interrupt channeling. This is with the exception of two special-cases: Teleport and  Shen's  Stand United. Roots and Entangles will, however, interrupt charged dashes (namely  Elastic Slingshot and  Vault Breaker) due to the second active no longer being castable.
  •  The Culling is specially coded and is interrupted only by things which "Block" basic attacks. Relative to standard channels most things will still interrupt it, however: Silence will not while Entangle will.
• Mercurial Scimitar and Dervish Blade will remove any crowd control effect that Quicksilver Sash would.

Types of Crowd Control

Airborne

• Airborne crowd control 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 to attacking and casting). In the game, the most recent move block will over-rule any previous move blocks.

• Move block
  • The target is unable to control movement.
    • The target remains targetable and will be affected by abilities as if they were on the ground (such as  Miasma).
    • The duration of the effect is related to how long the target is in the air. A common bug where a target who is dashing is made airborne causes them to be knocked "into orbit". The duration is largely extended due to the increased distance the target has to fall.
  • Interrupts active move blocks, namely other airborne effects and dashes.
  • Can be interrupted by subsequent move blocks, namely other airborne effects, dashes or blinks.
  • The duration is unaffected by crowd control reduction.
  • The effect cannot be removed by cleanse effects.
• Stun
  • The target is unable to cast abilities or basic attack.
  • The duration is affected by crowd control reduction and can be removed by cleansing effects.
  • Explained in more detail below.

• 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.
• 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).

Knockback

• The target is made airborne in a direction directly away from the point of cast.
• Champions with Knockback:  Alistar,  Azir,  Fizz,  Gnar,  Gragas,  Hecarim,  Janna,  Jayce,  Lee Sin,  Maokai,  Poppy,  Quinn,  Rammus,  Shyvana,  Syndra,  Thresh,  Tristana,  Vayne,  Vi,  Xin Zhao,  Ziggs

Knock Aside

• The target is made airborne in a direction perpendicular from the source.
• Champions with Knock Aside:  Draven,  Vi

Knockup

• The target is made airborne on the spot.
• Champions with Knockup:  Aatrox,  Alistar,  Azir,  Blitzcrank,  Braum,  Cho'Gath,  Fizz,  Janna,  Jarvan IV,  Lee Sin, Lulu,  Malphite,  Nami,  Nautilus,  Rek'Sai,  Riven, Sion,  Sejuani,  Vi,  Wukong,  Xin Zhao,  Yasuo,  Zyra

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:  Blitzcrank,  Darius,  Diana,  Orianna,  Nautilus,  Singed,  Skarner,  Syndra (against minions and monsters),  Thresh,  Viktor (not coded as airborne) and  Volibear

Blind

• The target will miss auto-attacks, incurring the message "Miss" above their attack target.
  • Blind only mitigates the physical damage portion of an attack, including physical damage sourced from a physical on-hit effect. Other damage types and effects won't miss. See: On-hit effects.
  • Abilities that apply on-hit effects will also miss.
  • Blind is considered a form of damage mitigation. As such, it is applied after Thornmail's passive.
• Does not interrupt channeling.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects (except for Mikael's Crucible).
• Blind will not affect certain champion abilities.(e.g. Riven's passive Runic Blade)
• Blinded enemies will only miss if they attack while blinded. Ranged units will still hit if the projectile fires before the blind.
• If  Vayne is blinded, she can only proc her  Silver Bolts if she tumbles. Normal auto attacks do not proc silver bolts while blinded (tested)
• Champions with Blind:  Teemo ,  Quinn

Entangle

• The target is unable to control movement or attack.
  • This includes abilities and summoner spells that move the champion.
  • This will not prevent delayed teleports that have already begun channeling, such as  Twisted Fate's  Gate. This is with the exception of Teleport and  Shen's  Stand United. The target will arrive rooted, if the duration permits.
• Does not interrupt the channeling of abilities.
  • Will interrupt charged dashes, namely:  Elastic Slingshot and  Vault Breaker.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Champions with Entangle:  Amumu

Forced Action

• ​The target is unable to control movement, attack or cast abilities.
• Interrupts the channeling of abilities.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.

Charm

• The target will attempt to move toward the source for the duration.
• If the target does not have vision of the source, they will instead stand still.
• If the source dies, the effect ends.
• Champions with Charm:  Ahri

Fear

• The target will walk in random directions with reduced movement speed for the duration.
• Champions with Fear:  Volibear (non-champion enemies only)

Flee

• The target will be locked in place for a brief duration and then run directly away from the source with reduced movement speed for the duration.
• Champions with Flee:  Fiddlesticks,  Hecarim,  Nocturne,  Shaco

Taunt

• The target will attempt to attack the source of the taunt for the duration.
• If the target does not have vision of the source, they will simply stand in place.
• If the target cannot attack the source (such as Zhonya's Hourglass), the target will simply stand in place.
• If the source dies, the effect ends.
• Champions with Taunt:  Shen,  Rammus,  Galio

Polymorph

• ​The target is unable to attack or cast abilities and is slowed for the duration.
  • This is distinct from Blind as the target cannot instigate an attack (whereas blind only occurs on-hit).
  •  Whimsy, when cast on an enemy, transforms the target into a small critter (reducing their size).
• Interrupts the channeling of abilities.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Champions with Polymorph:  Lulu

Root

• The target is unable to control movement.
  • This includes abilities and summoner spells that move the champion.
• Does not interrupt the channeling of abilities.
  • This will not prevent delayed blinks that have already begun channeling, such as  Twisted Fate's  Gate. This is with the exception of Teleport and  Shen's  Stand United. The target will arrive rooted, if the duration permits.
  • Will interrupt charged dashes, namely:  Elastic Slingshot and  Vault Breaker.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Champions with Root:  Caitlyn,  Jinx,  Karma,  LeBlanc,  Leona,  Lissandra,  Lux,  Maokai,  Morgana,  Nautilus, Rengar,  Ryze,  Swain,  Soraka,  Varus,  Zyra.

Silence

• The target is unable to cast abilities or the summoner spells Flash and Teleport. All other summoner spells are still usable.
• Interrupts the channeling of abilities.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Champions with silence:  Blitzcrank,  Cho'Gath,  Fiddlesticks,  Garen,  Malzahar,  Soraka

Slow

• The target has reduced movement speed.
• Does not interrupt the channeling of abilities.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Champions with slow:  Aatrox,  Akali,  Anivia,  Ashe,  Azir,  Braum,  Caitlyn,  Cassiopeia,  Cho'Gath,  Darius,  Diana,  Draven ,  Dr. Mundo,  Evelynn,  Fizz,  Galio,  Gangplank,  Gnar,  Gragas,  Graves,  Heimerdinger,  Irelia,  Janna,  Jarvan IV,  Jayce,  Jinx,  Karma,  Karthus,  Kassadin,  Kayle,  Kha'Zix  Kog'Maw,  LeBlanc,  Lee Sin,  Leona,  Lissandra,  Lulu,  Lux,  Malphite,  Maokai,  Miss Fortune,  Morgana,  Nami,  Nasus,  Nautilus,  Nunu,  Olaf,  Orianna,  Quinn,  Rammus, Rengar,  Rumble,  Sejuani,  Shaco,  Singed,  Sion,  Skarner,  Sona,  Soraka,  Swain,  Syndra,  Talon,  Teemo,  Thresh,  Tristana,  Trundle,  Tryndamere,  Twisted Fate,  Twitch,  Urgot,  Varus,  Vel'Koz,  Viktor,  Vladimir,  Volibear,  Xerath,  Xin Zhao,  Yorick,  Zac,  Zed,  Ziggs,  Zilean,  Zyra.

Stun

• The target is unable to control movement, attack or cast abilities.
• Will interrupt the channeling of abilities.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Champions with Stun:  Alistar,  Amumu,  Anivia,  Annie,  Ashe,  Braum,  Blitzcrank,  Brand,  Cassiopeia,  Elise,  Gnar,  Gragas,  Heimerdinger,  Irelia,  Jax,  Kennen,  Leona,  Lissandra,  Morgana,  Nautilus,  Pantheon,  Poppy,  Renekton,  Riven,  Sejuani,  Sona,  Skarner,  Syndra,  Taric,  Thresh,  Twisted Fate,  Udyr,  Vayne,  Veigar,  Viktor,  Xerath

Suspension

• The target is unable to control movement, attack or cast abilities.
  • The target remains targetable and will be affected by abilities as if they were on the ground (such as  Miasma).
• Interrupts the channeling of abilities.
• Interrupts dash abilities.
• Unlike a knockup, which is visually similar:
  • The duration is affected by crowd control reduction.
  • The effect can be removed by all cleansing effects.
• The target is considered to be "airborne" for the purposes of  Last Breath.
• Champions with Suspension:  Nami,  Vel'Koz,  Yasuo

Suppression

• The target is unable to control movement, attack, cast abilities or summoner spells (including cleanse).
• Will interrupt channeled abilities.
• The duration is not affected by crowd control reduction.
• The effect can be removed only by using Quicksilver Sash or Mercurial Scimitar ( Cleanse is not an option since Suppression prevents summoner spell use).
• Champions with Suppression:  Malzahar,  Skarner,  Urgot,  Warwick

Categorization

Loss of Control

Crowd control is often categorized into two categories depending on whether or not the effect removes total control of the player's character.

Hard CC — The following effects completely remove control of one's character:

• Airborne
• Forced Action
• Stun
• Suppression

Soft CC — The following only remove partial control of one's character:

• Blind
• Entangle
• Polymorph
• Root
• Silence
• Slow

Disruption

As an alternative to the above, crowd control is sometimes categorized into two categories depending on whether or not the effect disrupts the channeling of an ability; abilities such as  Karthus's  Requiem and  Katarina's  Death Lotus.

Hard CC — The following effects disrupt the channeling of abilities:

• Airborne
• Forced Action
• Polymorph
• Silence
• Stun
• Suppression

Soft CC — The following effects do not disrupt the channeling of abilities:

• Blind
• Entangle
• Root
• Slow

Modifiers

Abilities can also be categorized by what their effects inhibit.

Movement Modifiers — The following effects in some way inhibit movement:

• Airborne
• Entangle
• Forced Action
• Root
• Slow
• Stun
• Suppression

Action Modifiers — The following effects in some way inhibit the ability to attack or cast abilities:

• Airborne
• Blind
• Entangle
• Forced Action
• Polymorph
• Silence
• Stun
• Suppression

Countering Crowd Control

Crowd Control can be countered in various different ways.

Preventing

Crowd control can be prevented. All forms of crowd control can be prevented, including knockback, knockup and pull effects.

•  Master Yi's  Highlander prevents slows for its 10 seconds, champion kills and assists extend the duration by 4 seconds.
•  Poppy's  Diplomatic Immunity prevents all forms of CC for 6 / 7 / 8 seconds except from her target.
•  Olaf's  Ragnarok prevents all CC for 6 seconds.
•  Morgana's  Black Shield prevents all forms of CC for 5 seconds or until the shield is broken.
•  Nocturne's  Shroud of Darkness creates a magical shield for 1.5 seconds which can block the next enemy spell that hits him.
•  Sivir's  Spell Shield creates a magical barrier for 1.5 seconds which can block the next enemy spell that hits her.
• Banshee's Veil creates a spell shield that can block a spell once every 40 seconds.

Removing

Crowd control can be removed after it has been applied. These effects can be activated while under the effects of the crowd control.

All forms of crowd control can be removed except knockback, knockup and pull effects.

Items and Spells

• Cleanse removes all CC except suppression.
• Dervish Blade: Unique Active - Quicksilver: removes all debuffs from your champion. Melee champions also gain +50% movement speed for 1 second. 90 second cooldown.+50% attack speed, +45 magic resist, +10% cooldown reduction. 3000 gold.
• Mercurial Scimitar: Unique Active - Quicksilver: Removes all debuffs from your champion and grants +50% movement speed for 1 second. 90 second cooldown. 90 second cooldown.+80 attack damage, +45 magic resistance. 3800 gold.
• Mikael's Crucible: Unique Active: Removes all stuns, roots, taunts, fears, silences and slows on an allied champion and heals them for 150 + 10% of the target's maximum health. 180 second cooldown.+40 magic resist, +20 mana regeneration per 5, +10% cooldown reduction. Unique Passive - Mana Font: Increases your Mana Regen by 1% per 1% Mana you are missing. 2450 gold.
• Quicksilver Sash: Unique Active - Quicksilver: Removes all debuffs from your champion. 90 second cooldown.+45 magic resist 1550 gold.

Champion abilities

•  Alistar's  Unbreakable Will removes all forms of CC.
•  Gangplank's  Remove Scurvy removes all forms of CC.
•  Olaf's  Ragnarok removes and prevents all forms of CC.
•  Evelynn's  Dark Frenzy removes all slows.
•  Garen's  Decisive Strike removes all slows.
•  Master Yi's  Highlander removes and prevents all slows.

Reduction

Crowd control reduction reduces the duration of crowd control effects by a percentage equal to its value. The reduction will stack multiplicatively with other types of CC duration reduction.

Items

• Mercury's Treads: Unique Passive - Tenacity: The duration of stuns, slows, taunts, fears, silences, blinds, polymorphs, and immobilizes are reduced by 35%. +25 magic resistance, Unique Passive - Enhanced Movement: +45 movement speed. 1200 gold.
• Moonflair Spellblade: Unique Passive - Tenacity: The duration of stuns, slows, taunts, fears, silences, blinds, polymorphs, and immobilizes are reduced by 35%. +50 ability power, +50 armor, +50 magic resistance. 2600 gold.
• Zephyr: Unique Passive - Tenacity: The duration of stuns, slows, taunts, fears, silences, blinds, polymorphs, and immobilizes are reduced by 35%. +25 attack damage, +50% attack speed, +10% movement speed, +10% cooldown reduction. 2850 gold.
• Elixir of Iron: Click to Consume: Grants 25% increased Size, Slow Resistance, Tenacity and Path of Iron for 3 minutes. Level 9 required to purchase. Path of Iron Moving leaves a path behind that boosts allied champion's Movement Speed by 15%. 400 gold.

Champion abilities

•  Dr. Mundo's  Burning Agony reduces crowd control by 10 / 15 / 20 / 25 / 30% while active.
•  Garen's  Courage reduces crowd control by 30% for 2 / 3 / 4 / 5 / 6 seconds.
•  Irelia's  Ionian Fervor reduces crowd control by 10 / 25 / 40% for 1 / 2 / 3 nearby enemy champion(s).

Masteries/spells

• Cleanse reduces crowd control by 65% for 3 seconds.
• The Tenacious mastery reduces crowd control by 15%.

Slow Potency Reduction

These effects reduces the potency of movement slows. Similar effects stack multiplicatively with each other. Note: This does not reduce the duration of the effect.

• Boots of Swiftness reduces the potency of movement slows by 25%.
•  Sejuani's  Frost Armor reduces the potency of movement slows by 10 / 15 / 20 / 25%.
• Swiftness reduces the potency of movement slows by 10%.

Self-CC

The following effects are comparable to crowd control, except that the effect is caused voluntarily and affects the user rather than a target.

Self-Knockback: A champion that knockbacks itself and is temporarily unable to attack and issue movement commands. The target may still cast spells.

•  Ziggs's  Satchel Charge

Self-Root: A champion that roots itself is unable to control its movement and will ignore movement commands (included forced actions, such as fear). A champion that is rooted can still be moved by airborne effects, but it will not break the root.

•  Sion's  Decimating Smash
•  Vel'Koz's  Lifeform Disintegration Ray
•  Xerath's  Rite of the Arcane

Self-Silence: A champion that silences itself is unable to cast abilities. They may still attack and use summoner spells.

•  Rumble's  Junkyard Titan

These effects are not affected by crowd control reduction, nor can they be removed by cleansing effects.

A note on channeling and casting animations: neither are considered forms of crowd control, however disruptive they may be. A notable example is  Renekton's  Ruthless Predator, which incapacitates Renekton for a fair duration of the stun - much to many player's detest.

• Casting: The casting (sometimes "charging") of an ability cannot be cancelled by the player or an enemy except by death. Forced actions (such as taunt) will have no effect for the duration of the cast, and using airborne effects to move the player will not affect the trajectory of the skill - which will start from the point of cast, not from the player's current location. Summoner spells and most items can still be activated while casting.
• Channeling: The channeling of an ability can be cancelled by hard CC, or by the player attempting to perform another action (such as movement, casting another ability or attacking) - a notable exception is  Galio's  Bulwark, which can be cast during  Idol of Durand without interrupting the channel. Summoner spells and most items can be activated without disrupting channeling (which is particularly useful information for jungle  Fiddlesticks as Health Potions will not interrupt  Drain).
  • Self-Slow: A champion that slows itself has reduced movement speed. Most of the current examples are
    •  Garen's  Judgment (while passing through enemy units)
    •  Varus's  Piercing Arrow
    •  Vi's  Vault Breaker
    •  Xerath's  Arcanopulse
  • Self-Stun: The following champions have channeled abilities that the summoner cannot interrupt (contrary to most channels which will be interrupted if you attempt to move, attack or use another ability). This is comparable to a stun.
    •  Caitlyn's  Ace in the Hole
    •  Malzahar's  Nether Grasp (for the first 0.5 seconds of the duration)
    •  Urgot's  Hyper-Kinetic Position Reverser
    •  Warwick's  Infinite Duress

Trivia

•  Sona's  Crescendo causes the target to dance.
•  Nautilus possesses the highest number of separate crowd control effects, at four.
  •  Anivia,  Blitzcrank,  Janna,  Jarvan IV,  Leona,  Lissandra,  Lulu,  Nami,  Thresh,  Vel'Koz,  Zac,  Zyra and  Gragas each have three.
• The highest continuous form of crowd control reduction can be achieved by  Irelia's  Ionian Fervor with 3 nearby foes, Tenacity, Tenacious, and Elixir of Iron for 75%
  • Folowing the previous set-up, Irelia can achieve 3 seconds of 91% crowd control reduction by using Cleanse.
  • If the previous conditions are fulfilled while playing on Ultra Rapid Fire mode, Irelia can obtain a crowd control reduction of 93% for 3 seconds.
•  Tryndamere,  Karma, and  Heimerdinger are the only champions in the game that can activate an ability while disabled that doesn't remove the disable.  Alistar,  Gangplank and  Olaf also have an ability that can be activated while disabled, but these remove the disabling effects.

References

Champion Abilities
Targeting Types
Auto · Ground · Self · Direction · Unit
Effect Types
Aura · Blink · Buff · Crowd Control · Damage · Dash · Debuff · Healing · On-hit Effects · Pet · Shield · Sight