Crowd control/Action modifier

Action modifiers (more commonly known as disables or crowd control) prevent or reduce the effectiveness of actions the afflicted unit can take.

Types of action modifiers

• Blind
  • Makes the target always miss with auto attacks.
  • Has no effects on abilities and will not interrupt them or prevent their damage.
• Charm
  • Forces the target to walk towards the champion who applied this crowd control.
  • Prevents controlled movements, auto attacks, and the use of abilities.
  • Will interrupt channeled abilities.
  • Will slow the target.
• Fear
  • Forces the target to run around randomly around its location.
  • Prevents controlled movement, auto attacks, and the use of abilities.
  • Will interrupt channeled abilities.
  • Will slow the target.
• Knockup
  • Knocks the target into the air but does not change their location.
  • Prevents movement, auto attacks, and the use of abilities while in the air.
  • Will interrupt channeled abilities.
  • Cannot be removed by Cleanse or reduced by Tenacity.
• Polymorph
  • Prevents the use of most abilities.
  • Prevents auto attacks.
• Silence
  • Prevents use of most spells and abilities.
  • Does not stop auto attacks.
  • Will interrupt channeled abilities.
• Stun
  • Immobilizes and prevents actions.
  • Will interrupt channeled abilities.
  • Blocks use of most abilities.
• Suppression
  • Immobilizes and prevents actions.
  • Will interrupt channeled abilities.
  • Prevents use of most abilities.
  • Cannot be removed by Cleanse or reduced by Tenacity.
• Taunt
  • Forces the target to try to auto attack the taunting champion, making him unable to do anything else.
  • Will interrupt channeled abilities.
  • Can force movement because target will chase to try to autoattack while taunted.

Table of action modifiers

Action removal modifiers

These modifiers will take away a champion's ability to perform certain actions, such as: hit with auto attacks, move, use abilities/items, or combinations of these.

Blinds, knockups, silences, stuns and suppressions
Source	Name	Description	Duration	Notes
Summoner Spells
	Exhaust	Reduce autoattack damage by 70% and ability/item damage by 35%.	3 seconds	Also slows
Champion Abilities
Alistar	Pulverize	Knockup and Stun	1 + 0.5 seconds
Amumu	Bandage Toss	Stun	1 second
Anivia	Flash Frost	Stun	1 second	Upon detonation
Annie	Pyromania	Stun	1.75 seconds	Applied on damaging spell cast
Ashe	Enchanted Crystal Arrow	Stun	3 seconds	Applies only to the target hit directly
Blitzcrank	Rocket Grab	Stun	~0.5 sec	Pulls target towards Blitzcrank
	Power Fist	Knockup	2 seconds
	Static Field	Silence	0.5 seconds
Brand	Sear	Stun	2 seconds	On targets set ablaze
Cassiopeia	Petrifying Gaze	Stun	2 seconds	Enemies with their backs turned to Cassiopeia are slowed instead
Cho'Gath	Rupture	Knockup	1 second	Also applies a slow
	Feral Scream	Silence	(2/2.25/2.5/2.75/3) seconds
Fizz	Chum the Waters	Knockup	1
Fiddlesticks	Dark Wind	Silence	1.2 seconds	Each bounce refreshes the silence
Garen	Decisive Strike	Silence	2.5s
Heimerdinger	CH-1 Concussion Grenade	Blind	(1/1.5/2/2.5/3) seconds
		Stun	1.5 seconds	Only affects targets directly hit
Irelia	Equilibrium Strike	Stun	(1/1.25/1.5/1.75/2) seconds	Only targets with higher %HP
Janna	Howling Gale	Knockup	0.8 seconds
Jarvan IV	Dragon Strike	Knockup		Only on contact with Demacian Standard's flag
Jax	Counter Strike	Stun	1 second
Kassadin	Null Sphere	Silence	(1/1.4/1.8/2.2/2.6) seconds
Kennen	Mark of the Storm	Stun	1 second	On receiving third mark
LeBlanc	Sigil of Silence Mimic: Sigil of Silence	Silence	2 seconds	When activated by another ability
Leona	Shield of Daybreak	Stun	1.25 seconds
	Solar Flare	Stun	1.5 seconds	Only in the center of the AoE
Malphite	Unstoppable Force	Knockup	1.5 seconds
Malzahar	Call of the Void	Silence	(1.4/1.8/2.2/2.6/3) seconds
	Nether Grasp	Suppression	2.5 seconds	Suppression breaks when Malzahar stops channeling
Morgana	Soul Shackles	Stun	(1/1.5/2) seconds	Only if tethered targets, 3 sec after initial activation
Nami	Aqua Prison	Stun	1.25 seconds	Animation seems like a knockup, but it is only a stun.
	Tidal Wave	Knockup		Also slows all enemies hit.
Nautilus	Depth Charge	Stun	(1/1.5/2) seconds	Also knocks up target and all enemies it passes through
Pantheon	Aegis of Zeonia	Stun	1 second
Renekton	Ruthless Predator	Stun	0.75 seconds	1.5 seconds with ≥50 Fury
Riven	Ki Burst	Stun	0.75 seconds
Sejuani	Glacial Prison	Stun	2 seconds (on first champion hit)	Stun duration is halved in an area around the first champion is strikes. Applies Frost
Sion	Cryptic Gaze	Stun	1.5 seconds
Skarner	Impale	Suppression	1.75 seconds	Skarner may also drag the target during the suppression
Sona	Crescendo	Stun	1.5 seconds
Soraka	Infuse	Silence	(1/1.5/2/2.5/3) seconds
Taric	Dazzle	Stun	1.5 seconds
Teemo	Blinding Dart	Blind	(1.5/1.75/2/2.25/2.5) seconds
Twisted Fate	Pick a Card	Stun	(1/1.25/1.5/1.75/2) seconds	Gold Card
Udyr	Bear Stance	Stun	1 second	Applied on hit; 6s cooldown per target
Urgot	Hyper-Kinetic Position Reverser	Suppression	1 second	Switches the position of the target and Urgot.
Veigar	Event Horizon	Stun	(1.5/1.75/2/2.25/2.5) seconds	Upon first touching the perimeter. Only applies once per cast.
Viktor	Gravity Field	Stun	1.5 seconds	Upon reaching 3 slow stacks
	Chaos Storm	Silence	0.5 seconds	Applies only when cast
Warwick	Infinite Duress	Suppression	1.7 seconds	Suppression is broken when Warwick stops channeling
Wukong	Cyclone	Knockup		Knocks up any one target only once per cast
Xerath	Mage Chains	Stun	1.5 seconds	When detonated by another spell
Xin Zhao	Three Talon Strike	Knockup		Applied on third hit
Zyra	Stranglethorns	Knockup

Forced action modifiers

A special form of CC, but equally powerful, are the forced action modifiers. These force the target to do something, temporarily rendering the player's input useless. Specifically, taunts force the affected champion to attack the taunting champion, while fear causes the affected champion to simply run around aimlessly for the duration.

Fear, Taunt List
Source	Name	Description	Duration	Notes
Champion Abilities
Ahri	Charm	Charm	(1/1.25/1.5/1.75/2) seconds
Fiddlesticks	Terrify	Fear	(1/1.5/2/2.5/3) seconds
Galio	Idol Of Durand Idol Of Durand	Taunt	2 seconds
Hecarim	Onslaught of Shadows	Fear	1 second	Feared enemies run away from Hecarim
Nocturne	Unspeakable Horror	Fear	(1/1.25/1.5/1.75/2) seconds
Rammus	Puncturing Taunt	Taunt	(1/1.5/2/2.5/3) seconds
Shaco	Jack In The Box	Fear	(0.5/0.75/1/1.25/1.5) seconds	When triggered
Shen	Shadow Dash	Taunt	1.5 seconds
Volibear	Majestic Roar	Fear	3 seconds	Only on minions and monsters