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Mortal Strike icon.png

Critical strike is a passive ability that gives a chance to deal bonus damage on a successful attack.

Mechanics[]

Wraith King minimap icon.png Wraith King performing a critical strike.
The red number displays the resulting physical damage before reductions.

A Critical Strike's occurrence is determined upon beginning an attack, and not upon attack launch or attack landing.

For example, if the hero has Crystalys icon.png Crystalys and it starts an attack that procs Critical Strike, the attack applies Crystalys' Critical Strike value regardless of if the item is being upgrade in the middle of the attack animation. Or when attacking an enemy affected by Soul Rend, and the debuff expires during an already started attack animation, that attack still applies the Critical Strike, since the attack started while the debuff was still present.

Visual Feedback[]

When a Critical Strike occurs, a red-colored number pops up on the victim of the strike, with a lightning bolt icon on the right side of the number. This number shows the multiplied damage value before reductions or amplifications. Therefore, the displayed value does not equal the damage the target actually took from the attack.

Multiplier[]

An attack that triggers Critical Strike has its total damage value multiplied by the given multiplier of the source of the Critical Strike. This means a critical strike is basically an attack damage amplifier, as it does not add extra damage on top of the attack damage, but directly increases the damage of the attack by multiplying it.

The multiplier is applied before any reductions or amplifications on the target or on the attacking unit. It only counts the unit's main attack damage, plus any bonus attack damage (percentage and flat bonuses) it has, meaning any damage instance added to the attack damage which is separate from the attack damage itself is not considered by critical strikes. If an ability adds its damage directly to the attack damage, then it may be considered by Critical Strike, though there are exceptions to this. See total attack damage for the complete calculation.

Critical Strike Multiplier is defined as:

With C being the Critical Strike value.

All chance-based sources of Critical Strike use pseudo-random distribution.

Stacking[]

Multiple critical strike procs are rolled from the strongest to weakest multiplier, and stop rolling once proc occurs, so that two critical strikes cannot proc on the same attack, resulting in a diminishing behavior. This means when having multiple sources of chance-based crits, and the one with a higher multiplier procs, that attack is not counted for the other critical strike sources, since they did not roll. Thus their pseudo-random distribution states are preserved: the unrolled weaker critical strikes' current proc chance is neither increased nor reset for this attack.

For example, Tusk minimap icon.png Tusk's attack will not proc the critical strike of Daedalus icon.png Daedalus' (225%) while casting Walrus PUNCH! because the latter ability has a higher proc chance and critical strike value of 350%/375%/400%.

With cooldown-based critical strike sources (e.g. Mortal Strike), this means that when a stronger value occurs, the cooldown-based critical strike stays unused and does not go on cooldown for that attack.

Attack modifier interactions[]

Critical Strike is an attack modifier which fully stacks with any other modifier. However, it does not interfere with any attack modifier. If an attack modifier increases or reduces attack damage, it is counted by the critical damage multiplier. Abilities which grant conditional attack damage bonuses may or may not be by the multiplier.

  • Lifesteal: Lifesteal is calculated after critical strikes, which means that it increases the amount of life you steal.
  • Cleave: Cleave is calculated after critical strikes, which means it deals increased damage to all units within the cleave radius.
  • Splash and Psi Blades are calculated after critical strikes, which means they deals increased damage to all units within the cleave radius.

Conditional attack damage bonuses which are counted by critical strike are:

Conditional attack damage bonuses which are not counted by critical strike are:

1 Multishots / bounces can proc critical strikes. The bonus damage from the spell is not affected by critical damage.

Critical Strike Sources[]

The amount of damage increase is defined as:

With A being the attack damage, C being the Critical Strike value and P being the proc chance.

Chance-based Sources[]

Chance-based Critical Strike Abilities

Ensured Critical Strike Sources[]

Ensured Critical Strike Sources
  • Bloodthorn icon.png
    Critical Damage: 130%
    Duration: 5
    All attacks dealt to the affected target are critical strikes.
  • Track icon.png
    Self Critical Damage Against Target: 140%/170%/200%
    Duration: 30
    All attacks dealt by the caster to the affected target are critical strikes.
  • Luminosity icon.png
    Critical Damage: 120%/140%/160%/180% (Talent 160%/180%/200%/220%)
    Passive, ensured critical strike.
  • God's Rebuke icon.png
    Critical Damage: 150%/190%/230%/270% (Talent 215%/255%/295%/335%)
    Passive, ensured critical strike.
  • Leap icon.png
    Aghanim's Shard Upgrade
    Critical Damage: 150%
    Buff Duration: 2.5
    All attacks dealt by the caster are critical strikes for its buff duration.
  • Boundless Strike icon.png
    Critical Damage: 135%/165%/195%/225%
    Passive, ensured critical strike.
  • Silver Edge icon.png
    Critical Damage: 160%
    Has ensured critical strike on the attack that breaks invisibility.
  • Walrus Punch icon.png
    Critical Damage: 350%/375%/400% (Talent 430%/455%/480%)
    Ability cast on target has an ensured critical strike and has True Strike.
  • Astral Step icon.png
    Talent Upgrade
    Critical Damage: 160%
    Has ensured critical strike on all hit enemies within its range.
  • Mortal Strike icon.png
    Critical Damage: 150%/190%/230%/270%
    Cooldown: 5.5/5/4.5/4 (Talent 3.5/3/2.5/2)
    Passive ability, attacks has ensured critical strike when ability is off-cooldown.

Version History[]

Version
Description
  • Multiple critical strike procs are now rolled from the strongest to weakest multiplier and stop rolling once a proc occurs. [?]


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