Here is a summary of the types of Crowd Control.

   denotes that the action is blocked

	Movement	Attacking	Abilities	Interrupt	Spells	Reduction	Removal
Airborne						No
Blind		Miss				Yes
Entangle						Yes
Forced Action						Yes
Polymorph						Yes
Silence						Yes
Slow	Reduced					Yes
Snare/Root				See notes		Yes
Stun						Yes
Suppression					All	No

Please note the following:

• Movement includes abilities (such as Ezreal's  Arcane Shift).
  • For example, while airborne you can cast all summoner spells except 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, snares will not interrupt channeling (including channeled blinks such as  Crowstorm). They will, however, interrupt Teleport and charged abilities (namely  Elastic Slingshot,  Vault Breaker and  Piercing Arrow).
• Mercurial Scimitar removes any crowd control effect that Quicksilver Sash would.

Contents 1 Types of Crowd Control 1.1 Airborne 1.1.1 Knockback 1.1.2 Knock Aside 1.1.3 Knockup 1.1.4 Pull/Fling 1.2 Blind 1.3 Entangle 1.4 Forced Action 1.4.1 Charm 1.4.2 Fear 1.4.3 Flee 1.4.4 Taunt 1.5 Polymorph 1.6 Silence 1.7 Slow 1.8 Snare 1.9 Stun 1.10 Suppression

Types of Crowd Control Edit

Airborne Edit

• The target is unable to control movement, attack or cast abilities.
  • The target remains targetable and affected by area of effect damage, despite the visuals.
  • 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 the channeling of abilities.
• The duration is unaffected by crowd control reduction.
• The effect cannot be removed by any means.

Knockback Edit

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

Knock Aside Edit

• The target is made airborne in a direction tangent from the point of cast.
• Champions with Knock Aside: Draven, Sejuani ,  Vi

Knockup Edit

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

Pull/Fling Edit

• The target is made airborne in a direction toward the point of cast.
• The effect can also pull the target beyond the point of cast, also known as a Fling, Flip or Throw.
• Champions with Pull: Blitzcrank, Diana, Darius, Nautilus, Orianna, Singed, Thresh, Volibear

Blind Edit

• 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)
• Champions with Blind: Heimerdinger, Teemo ,  Quinn and Valor, Shaco(non-champions only)

Entangle Edit

• 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. The target will arrive snared, 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

Forced Action Edit

• ​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 Edit

• 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 Edit

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

Flee Edit

• The target will run directly away from the source.
• Champions with Flee: Hecarim

Taunt Edit

• 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 you cannot attack your target (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 Edit

• ​The target is unable to attack or cast abilities and is slowed for the duration.
  • This is distinct from Blind as the target cannot attack at all: as such, on-hit effects are never used/wasted.
  •  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

Silence Edit

• The target is unable to cast abilities but able to cast summoner spells (excluding Flash and Teleport).
• 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, Kassadin, LeBlanc, Malzahar, Soraka, Talon, Viktor

Slow Edit

• 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: Akali, Anivia, Ashe, Caitlyn, Cassiopeia, Cho'Gath, Darius, Draven , Dr. Mundo, Evelynn, Fizz, Galio, Gangplank, Gragas, Graves, Heimerdinger, Irelia, Janna, Jarvan IV, Jayce, Karma, Karthus, Kassadin, Kayle, Kha'Zix Kog'Maw, LeBlanc, Lee Sin, Leona, Lulu, Lux, Malphite, Maokai, Miss Fortune, Morgana,  Nami,  Nasus,  Nautilus, Nunu, Olaf, Orianna, Rammus, Rengar, Rumble, Sejuani, Shaco, Singed, Skarner, Sona, Swain, Syndra, Talon, Teemo, Thresh, Tristana, Trundle, Tryndamere, Twisted Fate, Twitch, Urgot, Varus, Viktor, Vladimir, Volibear, Xin Zhao, Yorick, Zac, Zed, Ziggs, Zilean, Zyra

Snare Edit

• The target is unable to control movement.
  • 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. The target will arrive snared, if the duration permits.
    • Unconfirmed Bug: Teleport is disrupted and put on a reduced cooldown.
• Does not interrupt the channeling of abilities.
  • Will interrupt charges abilities. Namely:  Elastic Slingshot,  Vault Breaker and  Piercing Arrow).
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects.
• Synonym for root and immobilize.
• Champions with Snare: Caitlyn, Karma, LeBlanc, Leona, Lux, Maokai, Morgana, Nautilus, Rengar, Ryze, Swain, Varus, Zyra.

Stun Edit

• 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: Amumu, Anivia, Annie, Ashe, Blitzcrank, Brand, Cassiopeia, Elise, Heimerdinger, Irelia, Jax, Kennen, Leona, Morgana,  Nami,  Pantheon, Poppy, Renekton, Riven, Sejuani, Sion, Sona, Syndra, Taric, Twisted Fate, Udyr, Vayne, Veigar, Viktor, Xerath

Suppression Edit

• 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 by all cleansing effects, except Cleanse (since Suppression prevents summoner spell use).
• Champions with Suppression: Malzahar, Skarner, Urgot, Warwick