Evasion

Evasion is a passive ability that gives the unit a chance to dodge an incoming physical attack. However, True Strike granted by Monkey King Bar will completely negate all evasion effects, except against towers.

Multiple sources of evasion stack, as well as other sources of miss chance such as blind effects and the uphill miss chance. While the actual chance to evade is diminishing, each source of evasion will have the same effectiveness regardless of how many there are. Evasion does not use pseudo-random distribution.

Faceless Void's is notable in that it is not considered Evasion, but rather damage negation, since it only nullifies the damage of attacks or spells, but not their secondary effects.

Evasion stacks multiplicatively, so we have:

Total chance to get hit = (first chance to get hit) x (second chance to get hit) x (nth chance to get hit) x 100, where chance to get hit = 1 - evasion

I.e. for Butterfly the chance to get hit is 0.65 because Butterfly has 0.35 evasion. The source of evasion values must be expressed in hundredth (so if we have 50% evasion, the value will be 50/100 = 0.5).

As an example, if Phantom Assassin has level four Blur (0.5 chance to get hit) and Butterfly (0.65 chance to get hit), she will have a 0.5 * 0.65 = 0.325 or 32.5% chance to get hit by attacks. A more concrete way of thinking about evasion stacking is that for an attack to bypass an evasion stack and connect, it should bypass each source of evasion in sequence. Only if all sources of evasion fail, will the attack be able to deal damage.

Sources of Evasion

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