Lifesteal

Lifesteal allows the attacking unit to gain Health when damaging an enemy, which includes any attack modifier with physical damage or magical damage. The lifesteal ability can be gained via items, passive abilities or the auras of other units.

The amount of health a unit gains from lifesteal is calculated by a percentage of the actual damage done to the attacked unit. This means it does not heal for overkill damage dealt on a unit, so if an attack's damage exceeded the target's current health and killed it, the heal is based on the target's remaining health. The only exceptions to this rule are 's Spell Lifesteal and, which always restore the full amount of health, no matter how much a unit had left when lifestealed off.

Lifesteal as Unique Attack Modifier
Lifesteal as a Unique Attack Modifier is the most common form of lifesteal and can be used by both melee and ranged units. With the exception of Satanic's Unholy Rage ability, they are all passive abilities. Items that give this type of lifesteal are:

These items do not stack with each other. The one in the highest priority slot will override the others.

Other sources of Lifesteal
These lifesteal effects fully stack with every other source of lifesteal and every other attack modifier, except with themselves.

Lifesteal Interaction with other Abilities

 * Critical Strike: Lifesteal is calculated after Critical Strikes, which means that it will increase the amount of life you steal.
 * Illusions do not benefit from lifesteal or lifesteal auras. The particles effects of lifesteal will show. This is to make lifesteal not instantly give away that they are illusions.
 * Lifesteal granted by Unique Attack Modifiers only stacks with.


 * If an attack modifier directly adds the damage it deals to the attack damage (like bashes), its damage will lifesteal. Secondary targets of extra shots that create completely new attack instances will steal life as long as they can carry attack modifiers. Therefore and  are excluded.

1 Can't lifesteal when originated from Unique Attack Modifiers.

Spell Lifesteal
Spell Lifesteal only comes into effect when using a spell that deals damage, healing for a certain percentage of the damage dealt by the spell. Spell Lifesteal stacks fully with every other source of lifesteal and every other attack modifier, except with themselves.

Pseudo-Lifesteal
Certain lifesteal effects work quite a bit different from regular lifesteal. Their mechanics are unique to the spell they are provided by.