Lifesteal: Difference between revisions

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Lifesteal is a stat that causes a percentage of damage dealt to be regained as health.
'''Lifesteal''' is a mechanic which heals a player by a portion of the damage they deal to an opponent. There are two main types of lifesteal, each with an associated [[stats|stat]]: {{plink|Bullet Lifesteal}}, which returns a portion of the [[Bullet Damage|bullet damage]] dealt, and {{plink|Spirit Lifesteal}}, which returns a portion of the [[Spirit Damage|spirit damage]] dealt. Bullet and Spirit Lifesteal are calculated identically, but are affected by different [[item|items]].


It can be gained as either Bullet Lifesteal or Spirit Lifesteal
== Formula ==
Despite being presented in-game as +X% Bullet/Spirit Lifesteal, different sources of lifesteal stack multiplicatively, not additively. With <math>n</math> different sources of the same category of lifesteal, final lifesteal <math>L_F</math> is given by:
 
<math>L_F = 1 - \prod_{i=1}^n (1 - L_i)</math><br/><!--this is rounded, but the game displays two different calculations where one is rounded up, and the other is rounded down-->
 
where <math>L_i</math> is the lifesteal provided by the <math>i</math>th source. Bullet and Spirit Lifesteal are calculated independently of each other, but both use the same formula.
 
=== Example ===
With 10% Bullet Lifesteal from {{item|Crippling Headshot}} and 35% Bullet Lifesteal from {{item|Leech}}, the player's final bullet lifesteal is:
 
<math>L_F = 1 - (1 - 0.10) \times (1 - 0.35) = 41.5%</math><!--the stat ingame says 42%, but the calculation on hover says 41%-->
 
This means that any time the player deals bullet damage to any opponent (including [[denizen|denizens]]), they will immediately be healed by 41.5% of the damage dealt. Note that the in-game user interface is inconsistent in how it rounds the final lifesteal percentage.
 
== Bullet Lifesteal ==
{{redirect|Bullet Lifesteal|the item|Bullet Lifesteal (item)}}
{{plink|Bullet Lifesteal}} returns a percentage of all outgoing [[Bullet Damage|bullet damage]] to the player as health.
 
=== Sources ===
{{Item stat table|Bullet Lifesteal}}
 
== Spirit Lifesteal ==
{{redirect|Spirit Lifesteal|the item|Spirit Lifesteal (item)}}
{{plink|Spirit Lifesteal}} returns a percentage of all outgoing [[Spirit Damage|spirit damage]] to the player as health.
 
=== Sources ===
{{Item stat table|Spirit Lifesteal}}
 
=== Soul Shredder Bullets ===
The debuff applied to opponents by {{item|Soul Shredder Bullets}} behaves differently from all other lifesteal items. It does not affect the user's Spirit Lifesteal stat, nor is it factored into the formula above; instead, it ''adds'' a flat +20% spirit lifesteal against an affected target while the debuff is active. For example, if a player had Soul Shredder Bullets, {{item|Enduring Spirit}} (+10%), and {{item|Leech}} (+35%), their spirit lifesteal against a target affected by Soul Shredder Bullets would be:
 
<math>L_F = [1 - (1 - 0.10) \times (1 - 0.35)] + 0.20 = 61.5%</math>
 
Their spirit lifesteal against a target not affected by Soul Shredder Bullets would instead be 41.5% (equal to their Spirit Lifesteal stat).
 
== Melee Lifesteal ==
{{main|Melee Lifesteal|Lifestrike}}
 
Melee Lifesteal is not a stat. The item {{item|Melee Lifesteal}} and its upgrade {{item|Lifestrike}} both provide a passive ability which heals the user by a percentage of their [[Melee Damage|melee damage]] dealt, but they behave differently from Bullet and Spirit Lifesteal. These abilities activate for one melee attack, then go on cooldown for several seconds, during which no further health can be regained from melee attacks; Bullet and Spirit Lifesteal are always active and have no associated cooldowns. These items also grant a flat healing bonus on activation, and are less effective against non-[[hero|heroes]], neither of which is true of Bullet and Spirit Lifesteal.
 
{{Stats}}
[[Category:Stats]]

Revision as of 22:16, 12 November 2024

Lifesteal is a mechanic which heals a player by a portion of the damage they deal to an opponent. There are two main types of lifesteal, each with an associated stat: Bullet Lifesteal, which returns a portion of the bullet damage dealt, and Spirit Lifesteal, which returns a portion of the spirit damage dealt. Bullet and Spirit Lifesteal are calculated identically, but are affected by different items.

Formula

Despite being presented in-game as +X% Bullet/Spirit Lifesteal, different sources of lifesteal stack multiplicatively, not additively. With different sources of the same category of lifesteal, final lifesteal is given by:


where is the lifesteal provided by the th source. Bullet and Spirit Lifesteal are calculated independently of each other, but both use the same formula.

Example

With 10% Bullet Lifesteal from Crippling Headshot and 35% Bullet Lifesteal from Leech, the player's final bullet lifesteal is:

This means that any time the player deals bullet damage to any opponent (including denizens), they will immediately be healed by 41.5% of the damage dealt. Note that the in-game user interface is inconsistent in how it rounds the final lifesteal percentage.

Bullet Lifesteal

"Bullet Lifesteal" redirects here. For the item, see Bullet Lifesteal (item).

Bullet Lifesteal returns a percentage of all outgoing bullet damage to the player as health.

Sources

List of items
NameSoulsCostCategoryStat change
Active Reload1,250Weapon+20% Bullet Lifesteal
Heroic Aura3,000Weapon+20% Bullet Lifesteal
Crippling Headshot6,200Weapon+10% Bullet Lifesteal
Vampiric Burst6,200Weapon+100% Bullet Lifesteal
Bullet Lifesteal1,250Vitality+28% Bullet Lifesteal
Leech6,200Vitality+35% Bullet Lifesteal

Spirit Lifesteal

"Spirit Lifesteal" redirects here. For the item, see Spirit Lifesteal (item).

Spirit Lifesteal returns a percentage of all outgoing spirit damage to the player as health.

Sources

List of items
NameSoulsCostCategoryStat change
Soul Shredder Bullets1,250Weapon+20% Spirit Lifesteal
Crippling Headshot6,200Weapon+10% Spirit Lifesteal
Spiritual Overflow6,200Weapon+10% Spirit Lifesteal
Enduring Spirit500Vitality+10% Spirit Lifesteal
Spirit Lifesteal1,250Vitality+23% Spirit Lifesteal
Leech6,200Vitality+35% Spirit Lifesteal
Infuser500Spirit+20% Spirit Lifesteal
Slowing Hex1,750Spirit+10% Spirit Lifesteal
Diviner's Kevlar6,200Spirit+20% Spirit Lifesteal
Mystic Reverb6,200Spirit+14% Spirit Lifesteal

Soul Shredder Bullets

The debuff applied to opponents by Soul Shredder Bullets behaves differently from all other lifesteal items. It does not affect the user's Spirit Lifesteal stat, nor is it factored into the formula above; instead, it adds a flat +20% spirit lifesteal against an affected target while the debuff is active. For example, if a player had Soul Shredder Bullets, Enduring Spirit (+10%), and Leech (+35%), their spirit lifesteal against a target affected by Soul Shredder Bullets would be:

Their spirit lifesteal against a target not affected by Soul Shredder Bullets would instead be 41.5% (equal to their Spirit Lifesteal stat).

Melee Lifesteal

Main articles: Melee Lifesteal, Lifestrike

Melee Lifesteal is not a stat. The item Melee Lifesteal and its upgrade Lifestrike both provide a passive ability which heals the user by a percentage of their melee damage dealt, but they behave differently from Bullet and Spirit Lifesteal. These abilities activate for one melee attack, then go on cooldown for several seconds, during which no further health can be regained from melee attacks; Bullet and Spirit Lifesteal are always active and have no associated cooldowns. These items also grant a flat healing bonus on activation, and are less effective against non-heroes, neither of which is true of Bullet and Spirit Lifesteal.