A critical strike is a basic attack or an ability that deals twice its normal damage.

All basic attacks can critically strike, but only a few abilities can. Examples of abilities that can critically strike are GangplankSquare Gangplank's Parrrley Parrrley and YasuoSquare Yasuo's Steel Tempest Steel Tempest, which act like a basic attack; and GarenSquare Garen's Judgment Judgment and Master YiSquare Master Yi's Alpha Strike Alpha Strike, which are specially stated. It's not possible to critically strike structures, with the exception of JhinSquare Jhin, whose fourth shot receives minicrits against structures.

Most champions have special attack animations for critical strikes. This includes mages and other champions not meant to be built using basic attacks for damage. Other champions have a sound that plays when they critically strike, typically a grunt of effort.

Players can increase their chances to critically strike and the damage they deal with critical strikes using items, abilities, and runes. Critical strikes are specially valuable for champions who deal damage primarily with basic attacks rather than abilities. Some champions, like AsheSquare Ashe, have an affinity for critical strikes and benefit more than others from items that improve them.

Chance

Critical strike chance is the chance that a basic attack of a champion deals a critical strike. Critical strike chance stacks additively. Runes, items, and abilities can increase critical strike chance.

When averaged over a large number of autoattacks and at Base critical damage (100% bonus damage), critical strike chance is essentially a damage multiplier where each 1% of critical chance adds 1% bonus damage. Thus at 50% critical strike chance a champion deals (on average) 150% damage with autoattacks, not counting Bonus critical strike damage. Because of this, critical strike chance scales well with both attack damage and attack speed. The formula for this damage multiplier is:

Damage multiplier = 1 + (Critical chance × (1 + Bonus critical damage))

The maximum critical strike chance is 100%.

Critical strike chance has a theoretical gold value of Gold 40 per 1% critical strike chance. This makes Brawler's Gloves item Brawler's Gloves the most efficient core item for critical strike chance, as it grants +10% critical chance for the cost of Gold 400 with a Gold 40 per 1% critical chance efficiency. Cloak of Agility item Cloak of Agility has the same efficiency.

Increasing critical strike chance

Items

Item Cost Amount Availability
Brawler's Gloves item Brawler's Gloves400 Gold 10 %Common
Cloak of Agility item Cloak of Agility800 Gold 20 %Common
Essence Reaver item Essence Reaver3400 Gold 20 %Common
Infinity Edge item Infinity Edge3400 Gold 20 %Common
Molten Edge item Molten Edge4400 Gold 20 %Common
Phantom Dancer item Phantom Dancer2600 Gold 30 %Common
Rapid Firecannon item Rapid Firecannon2600 Gold 30 %Common
Runaan's Hurricane item Runaan's Hurricane2600 Gold 30 %Common
Statikk Shiv item Statikk Shiv2600 Gold 30 %Common
Zeal item Zeal1200 Gold 20 %Common

Champion abilities

Note: Ability that boost attack speed have an indirect impact on the number of critical strikes.

  • FioraSquare Fiora's Bladework Bladework grants her 100% critical chance on her next second attack.
  • JhinSquare Jhin's Whisper Whisper passively grants him 100% critical chance every fourth basic attack.
    • The fourth and final shot of Curtain Call Curtain Call has a 100% critical chance.
  • PantheonSquare Pantheon's Certain Death Certain Death grants him 100% critical chance against targets below 15% of their maximum health.
  • RengarSquare Rengar's Thrill of the Hunt Thrill of the Hunt grants him 100% critical chance for his next basic attack against his closest target.
  • ShacoSquare Shaco's Backstab Backstab passively grants him 100% critical chance for every basic attack striking an enemy unit from behind. This cannot happen on the same target more than once every 3 seconds.
  • TalonSquare Talon's Noxian Diplomacy Noxian Diplomacy grants him 100% critical chance if he hits its target within a 170 range.
  • TryndamereSquare Tryndamere's Battle Fury Battle Fury grants him 0.35% critical chance per point of Fury he currently has.
  • YasuoSquare Yasuo gains double the critical strike chance from all sources thanks to his passive Way of the Wanderer Way of the Wanderer.

Modifying Critical Strike Damage

Notes

Champion Abilities

  • FioraSquare Fiora's Bladework Bladework modifies her base critical damage to 140 / 155 / 170 / 185 / 200% from the default of 200%.
  • JhinSquare Jhin's Whisper Whisper multiplicatively reduces his total critical damage by 25% for basic attacks.
  • ShacoSquare Shaco's Backstab Backstab modifies his base critical damage to 130% from the default of 200%.
  • YasuoSquare Yasuo's Way of the Wanderer Intent multiplicatively reduces his total critical damage by 10% for basic attacks and 25% for Steel Tempest Steel Tempest (e.g. 200% to 190% / 175%).
  • Note: AsheSquare Ashe's Frost Shot Frost Shot does not modify the base critical damage. Instead, it does the following:
    • Only allows critical strikes on auto-attacks against targets affected by Frost Shot 2 Frost.
    • Removes the randomness of critical strikes. It does so by simultaneously increasing the proc probability to 100% and reducing the extra damage on proc by the same multiplicative factor.
    • Adds straight 10% multiplicative bonus damage that is unrelated to critical strikes.

Items

  • Infinity Edge item Infinity Edge: Passive: Unique: Critical strike bonus damage is increased by 50%.

Skills affected by Critical Chance

Some skills can critically strike and/or are affected by critical chance:

Others
  • CaitlynSquare Caitlyn's Headshot Headshot: Critical strike icon Critical strikes do bonus 250% AD × (Total critical damage − 100%) against minions and monsters.
  • GarenSquare Garen's Judgment Judgment: Critical strike icon Critical strikes do bonus entire damage portion × (Total critical damage − 100%).
  • JayceSquare Jayce's Hyper Charge Hyper Charge: Critical strike icon Critical strikes do bonus entire damage × (Total critical damage − 100%).
  • JhinSquare Jhin's Curtain Call Curtain Call: The Curtain Call 3 final shot is a Critical strike icon critical strike, doing bonus 100% AD × (Total critical damage − 100%).
  • LucianSquare Lucian's Lightslinger Lightslinger: The additional shot does bonus entire damage × (Total critical damage − 100%) if it is a Critical strike icon critical strike.
  • Master YiSquare Master Yi's Double Strike Double Strike: The additional strike does bonus 50% AD × (Total critical damage − 100%) if it is a Critical strike icon critical strike.
    • Alpha Strike Alpha Strike: Critical strike icon Critical strikes do bonus 60% AD × (Total critical damage − 100%).
  • Miss FortuneSquare Miss Fortune's Double Up Double Up: The second bounce can Critical strike icon critically strike dealing bonus entire damage × (Total critical damage − 100%). If the first bounce kills it's target, the second bounce will always Critical strike icon critically strike.
    • Bullet Time Bullet Time: Each wave can Critical strike icon critically strike, dealing 20% × (Total critical damage − 100%) bonus damage.
  • PantheonSquare Pantheon's Spear Shot Spear Shot: Critical strike icon Critical strikes do bonus 70% bonus AD  × (Total critical damage − 100%).
  • NasusSquare Nasus' Siphoning Strike Siphoning Strike: Critical strike icon Critical strikes do bonus base damage × (Total critical damage − 100%).
  • YasuoSquare Yasuo's Steel Tempest Steel Tempest: Critical strike icon Critical strikes do bonus 75% AD × (Total critical damage − 100%).
Additions
  • ShacoSquare Shaco's Backstab Backstab: Critical strike icon Critical strikes do increased damage after critical modifier.
  • TryndamereSquare Tryndamere's Spinning Slash Spinning Slash: Cooldown is reduced by 1 second for every Critical strike icon critical strike. This effect is doubled against champions.

Miscellaneous

Other skills that are not affected by critical strikes and chances are displayed as a critical strike due to other reasons.

  • Affected by Critical strike damage
    • FioraSquare Fiora's Bladework Bladework: Causes next second auto-attack to deal increased damage, which is described as a Critical strike icon critical strike.
    • PantheonSquare Pantheon's Spear Shot Spear Shot: Will Critical strike icon critically strike for a +50% damage bonus due to the passive from Certain Death Certain Death if the target is under 15% health.
    • ShacoSquare Shaco's Deceive Deceive: The next basic attack from behind a target within 2.5 seconds will deal increased damage and will be a Critical strike icon critical strike.
  • Unaffected by Critical strike damage
    • AniviaSquare Anivia's Frostbite Frostbite: The 2 × damage modifier applied by being chilled by Flash Frost Flash Frost is given out as a Critical strike icon critical strike.
    • EvelynnSquare Evelynn's Empowered Whiplash Whiplash: While Demon Shade Demon Shade is active, the next cast of Whiplash Whiplash is empowered and deals extra damage, given out as a Critical strike icon critical strike.
      • Last Caress Last Caress: The double damage dealt to enemies under 30% of their maximum health is given out as as a Critical strike icon critical strike.
    • FizzSquare Fizz's Seastone Trident Seastone Trident: The triple damage dealt to a target that has been bleeding for more than 2 seconds is given out as a Critical strike icon critical strike.
    • GnarSquare Gnar's GNAR! GNAR!: The damage is given out as a Critical strike icon critical strike when enemy hits terrain.
    • GragasSquare Gragas' Barrel Roll Barrel Roll: The damage is given out as a Critical strike icon critical strike when the cask ferments after 2 seconds.
    • KarthusSquare Karthus' Lay Waste Lay Waste: Appears as a Critical strike icon critical strike when acting like a single target spell (hitting only one enemy).
    • Kog'MawSquare Kog'Maw's Living Artillery Living Artillery: The double damage dealt to enemies under 40% of their maximum health is given out as a Critical strike icon critical strike.
    • LeBlancSquare LeBlanc's Sigil of Malice Sigil of Malice: When the sigil is shattered by Leblanc's next ability against the target, the combined damage of the sigil and the ability is given out as a Critical strike icon critical strike.
    • NidaleeSquare Nidalee's Takedown Takedown: The 40% increased damage dealt to Prowl Hunted targets is given out as a Critical strike icon critical strike.
    • RyzeSquare Ryze's Overload Overload: The extra damage applied to a target marked with Spell Flux Flux is given out as a Critical strike icon critical strike.
    • VayneSquare Vayne's Condemn Condemn: The double-damage applied by being knocked into a wall is given out as a Critical strike icon critical strike.
    • VladimirSquare Vladimir's Transfusion Transfusion: The extra damage applied when under the effect of Crimson Rush Crimson Rush is given out as a Critical strike icon critical strike.
    • ZiggsSquare Ziggs' Satchel Charge Satchel Charge: The damage is given out as a Critical strike icon critical strike when used to hexplode a tower.


Trivia

  • In many MMO settings, a number of attack damage-based assassins or secondary assassin-based champions also benefit from high critical strike chance in varying forms, as a means to help finish off targets faster as well as to deal more damage in bursts overall.
  • Some champions may actually use their critical strike animation for their empowered-basic attack if they ever activate a single-use on-hit effect, only it does not actually count as an actual critical strike.

Last updated: November 18th, 2017 – V7.22

The most gold efficient way to obtain 100% critical strike chance is with YasuoSquare Yasuo, requiring only Gold 2000:

  • Items:
  • Critical Strike Chance Amplification:
  • Relevant mathematics:
    • YasuoSquare Yasuo Critical Strike Chance = 50% × 2 = 100% critical chance


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