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Crowd control

Revision as of 05:43, 19 July 2015 by Ozuar (Message Wall | contribs) (→‎{{anchor|Stasis}} Stasis)
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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. Crowd control is also often split into two types: "soft" crowd control, which hinders a target without specifically preventing them from performing any action, and "hard" crowd control, which negates or blocks the use of certain effects. There are many different forms of crowd control in League of Legends, each of which is unique in the way it affects its target, as well as the way it can be resisted, mitigated or removed.

Types of Crowd Control

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

  • Template:Cctip: 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' Rammus' Powerball Powerball) to 1.5 (Lulu's Lulu's Wild Growth 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' Rammus' Powerball Powerball) to 1.5 (Lulu's Lulu's Wild Growth Wild Growth).
    • Pull: A pull effect causes the target to be made airborne in a direction toward the point of cast.
  • Template:Cctip: 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.
  • Template:Cctip: A unit that is disarmed cannot declare attacks for the duration. There are currently no examples of Disarm as a standalone crowd control type.
    • Template:Cctip is a combination of Disarm and Root.
    • Template:Cctip 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.
    • Template:Cctip: A unit that is charmed will move toward the source for the duration.
    • Template:Cctip: 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.
    • Template:Cctip: A unit that is fleeing will move directly away from the source with reduced movement speed for the duration.[1]
    • Template:Cctip: A unit that is taunted will attempt to autoattack the source of the taunt for the duration.
  • Template:Cctip: A unit that is rooted is unable to control its movement for the duration (occasionally referred to as a Snare).
  • Template:Cctip: A unit that is silenced cannot cast abilities or activate items for the duration.
  • Template:Cctip: A unit that is slowed has reduced movement and/or attack speed for the duration.
  • Template:Cctip: A unit that is in stasis is unable to perform any action while being untargetable and invulnerable. The duration is also unaffected by crowd control reduction.
  • Template:Cctip: A unit that is stunned is unable to move, attack or cast abilities for the duration.
    • Template:Cctip: A unit that is suspended is considered to be airborne for the purposes of Last Breath Last Breath, but for countering purposes it's considered a stun.
  • Template:Cctip: A unit that is suppressed is unable to control its movement, attack, cast abilities or use spells (including Cleanse 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 FlashTeleport No See notes
Blind Allowed Miss Allowed No None Yes CleanseFile:Quicksilver Sash.gif
Disarm Allowed Blocked Allowed See notes None Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Forced Action Blocked Blocked Blocked Yes FlashTeleport Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Root Blocked Allowed Allowed See notes FlashTeleport Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Silence Allowed Allowed Blocked Yes FlashTeleport Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Slow Reduced Allowed Allowed No None Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Stasis Blocked Blocked Blocked Yes All No None
Stun Blocked Blocked Blocked Yes FlashTeleport Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Suspension Blocked Blocked Blocked Yes FlashTeleport Yes CleanseFile:Quicksilver Sash.gifFile:Mikael's Crucible.gif
Suppression Blocked Blocked Blocked Yes All No File:Quicksilver Sash.gif

Please note the following:

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 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 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 Sion's Unstoppable Onslaught 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 Azir's Emperor's Divide 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
Knock Aside
  • The target is made airborne in a direction perpendicular from the source.
  • Champions with Knock Aside: Draven Draven, Vi Vi.
Knockup
Pull

Blind

  • The target's autoattacks will deal no damage, incurring the message "Miss" above their attack target.
    • Blind only mitigates the physical damage portion of an attack, usually but not always including physical damage sourced from a physical on-hit effect. Other damage types and effects will not miss. See: on-hit effects.
    • Abilities that apply on-hit effects will also miss.
    • Blind is considered a form of damage mitigation. As such, Thornmail Thornmail will still return damage despite the attack dealing no base damage.
  • 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 Mikael's Crucible).
  • Attacks will only miss if the attack is declared while blinded. An attack will not miss if the projectile was en-route prior to being blinded.
  • Champions with Blind: Teemo Teemo , Quinn Quinn.

Disarm

  • The target is unable to autoattack.
    • This is distinct from Blind as the target cannot instigate an attack (whereas blind only occurs on-hit).
  • Does not interrupt channeling.
  • The duration is affected by crowd control reduction.
  • Effects with disarm components can be removed by all cleansing effects.
  • Currently, no champion can disarm opponents as a standalone effect, though the crowd control is implicit in other effects such as Entangle and Polymorph.

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 Twisted Fate's Gate Gate. This is with the exception of Teleport Teleport and Shen's Shen's Stand United Stand United. The target will arrive rooted, if the duration permits.
  • 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 Entangle: Amumu 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
"Charm" redirects here. For the item, see Faerie 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 Ahri.
Fear
  • The target will walk in random directions with reduced movement speed for the duration.
  • Champions with Fear: Volibear 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 Fiddlesticks, Hecarim Hecarim, Nocturne Nocturne, Shaco Shaco.
  • Visual effect: black head with orange aureole over affected champion's head.
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 Zhonya's Hourglass), the target will simply stand in place.
  • If the source dies, the effect ends.
  • Champions with Taunt: Shen Shen, Rammus Rammus, Galio Galio.
  • Visual effect: red circles around affected champion's head.

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 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 Lulu.

Root/snare

Silence

  • The target is unable to cast abilities or the summoner spells Flash Flash and Teleport 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 Blitzcrank, Cho'Gath Cho'Gath, Fiddlesticks Fiddlesticks, Garen Garen, Malzahar Malzahar, Soraka Soraka.
  • Visual effect: Speech balloon with black ellipsis (...).

Slow

Stasis

  • The target is unable to control movement, attack, cast abilities, activate items or use summoner spells.
    • The target is also untargetable and invulnerable for the duration.
  • Interrupts the channeling of abilities.
  • Interrupts dash abilities.
  • The duration is not affected by crowd control reduction.
  • The effect cannot be removed by any means.
  • Champions with Stasis: Aatrox Aatrox, Bard Bard, Lissandra Lissandra (a similar effect), Tahm Kench Tahm Kench and Zilean Zilean.
  • Visual effect depends on particular champion.

Stun

Suppression

  • The target is unable to control movement, attack, cast abilities or use summoner spells.
  • Will interrupt channeled abilities.
  • The duration is not affected by crowd control reduction.
  • The effect can be removed only by using Quicksilver Sash Quicksilver Sash or Mercurial Scimitar Mercurial Scimitar (Cleanse Cleanse is not an option since Suppression prevents summoner spell use).
  • Champions with Suppression: Malzahar Malzahar, Skarner Skarner, Urgot Urgot, Warwick Warwick.
  • No special visual effect.

Suspension

  • Suspension is a stun with "airborne" effect for the purposes of Last Breath Last Breath.
  • 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 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 Last Breath.
  • Champions with Suspension: Nami Nami, Vel'Koz Vel'Koz, Yasuo Yasuo.
  • Visual effect: swirl over champion's head.

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
  • Suspension

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' Karthus' Requiem Requiem and Katarina's Katarina's Death Lotus Death Lotus.

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

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

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
  • Suspension

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
  • Suspension

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.

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 Cleanse removes all CC except suppression.
  • Template:Ile
  • Template:Ile
  • Template:Ile
  • Template:Ile


Champion abilities

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

  • Template:Ile
  • Template:Ile
  • Template:Ile
  • Template:Ile

Champion abilities

Masteries/spells

  • Cleanse Cleanse reduces crowd control by 65% for 3 seconds.
  • The Tenacious mastery 2014 Tenacious mastery reduces crowd control by 10%.

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 Boots of Swiftness reduces the potency of movement slows by 25%.
  • Sejuani's Sejuani's Frost Armor Frost Armor reduces the potency of movement slows by Error: Parameter '3' is not accepted.% for 2 seconds after damaging an enemy with an ability or basic attack.
  • Swiftness mastery 2014 Swiftness reduces the potency of movement slows by 7.5 / 15%.

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. These effects cannot be removed by cleansing mechanisms and will ignore all crowd control immunity and reduction except in the case of self-slows, which will be affected by slow potency reduction (such as from Boots of Swiftness Boots of Swiftness).

  • Self-Knockback: A champion that knockbacks itself is temporarily unable to attack and issue movement commands. The target may still cast spells.
  • 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.
  • Self-Silence: A champion that silences itself is unable to cast abilities. They may still attack and use summoner spells.

Cast Times and Channels

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.

The channelling of an ability, by contrast, will be cancelled by hard CC, and will also automatically cancel should the champion attempt to perform another action (such as movement, casting another ability or attacking) - there do exist exceptions to this rule, such as Galio's Galio's Bulwark Bulwark cast while channelling Idol of Durand Idol of Durand, but these are usually specific coding allowances and not standard behaviour. Summoner spells and most items can typically be activated without disrupting a channel.

Channelling and casting animations are generally not considered forms of crowd control, however disruptive they may be. There do exist several notable exceptions, however:

Trivia

References

  1. ↑ Wiksy describes Flee

Template:Ability types

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