Blood Loss | PoE2 Mechanic

What Blood Loss does

Current rules

Deal Physical damage over time and allow it to remove Life before using a Blood Loss payoff. Damage that never occurs does not add Blood Loss, so instantly killing a full-life enemy with the initial Hit leaves no time for an accompanying Bleed to contribute. Blood Loss records prior Life loss; it does not deal damage by itself.

Actual Physical damage over time is counted: Blood Loss accumulates from Physical damage over time the target has taken, including Bleeding and Corrupted Blood. Potential future damage, the remaining duration of a Debuff, and Physical damage from Hits are not counted by the default rule.
The damage must remove Life: Blood Loss is added when the target actually loses Life to qualifying Physical damage over time. If the initial Hit kills the enemy before the damage over time deals any damage, the unused Bleed does not create Blood Loss.
Bleeding is not the only contributor: Bleeding is the most common source, but Corrupted Blood and another qualifying Physical damage-over-time effect can also add Blood Loss. A build does not need to treat Corrupted Blood as Bleeding for its damage to contribute.
Blood Loss is a recorded amount, not another Debuff: Blood Loss does not tick for damage and is not an extra Bleed stack. It is a value that payoff Skills read for explosions, Life loss, or Heavy Stun buildup.
Explicit Hit conversion can add Blood Loss: Atziri's Acuity overrides the default source restriction by causing 10% of Physical damage dealt by your Hits to become Blood Loss. That item line does not mean every Physical Hit normally adds Blood Loss.
Player movement does not change the stored amount directly: Since version 0.5.0, player movement no longer increases Bleed damage taken. Movement can still make Bleeding on monsters deal extra damage, which can indirectly build Blood Loss faster because more qualifying damage is actually taken.

Skills and items that use Blood Loss

5 cases

01

Blood Hunt

Hitting a target that has suffered Blood Loss creates an explosion and consumes Bleeding. The explosion makes enemies lose Life equal to 25% of the consumed Blood Loss and can gain up to 500% more area of effect from the amount consumed.

Related: Blood Hunt, Bleeding

02

Herald of Blood

Killing an enemy with Blood Loss creates a 1.5 metre Physical Attack explosion. Its current base line deals 15% of the exploded enemy's Blood Loss as unscalable damage, gains more from quality, and can Aggravate Bleeding on enemies it hits.

03

Bloodhound's Mark

The marked target receives Heavy Stun buildup equal to 300% of Blood Loss. The Mark activates when the enemy is Heavily Stunned, or on death if enough of that buildup came from Blood Loss, then triggers Blood Explosion.

04

Atziri's Acuity

The gloves cause 10% of Physical damage dealt by your Hits to add Blood Loss and grant Herald of the Royal Queen. This supplies immediate Blood Loss for its own on-kill explosion without waiting only on Physical damage over time.

05

Bleeding and Corrupted Blood

Damage actually taken from either effect contributes because both deal Physical damage over time. Their application, stacking, duration, removal, and scaling rules remain separate.

Limits and exceptions

5 rules

Blood Loss does not deal damage by itself.
Physical Hit damage does not add Blood Loss unless an effect such as Atziri's Acuity explicitly says it does.
A damage-over-time effect that deals no damage before the target dies contributes nothing.
Blood Loss does not make Corrupted Blood count as Bleeding.
Blood Loss payoff wording decides whether Bleeding is consumed, the target must die, or Heavy Stun buildup is applied.

Related pages

10 connections

mechanicPhysical

Physical damage is one of the five Damage Types. It is the most common and the only one reduced by Armour, rather than by a Resistance.

mechanicBleeding

Bleeding is a damaging Ailment that deals Physical damage over time and bypasses Energy Shield. It lasts five seconds by default and requires an explicit chance or effect that can inflict Bleeding.

mechanicCorrupted Blood

Corrupted Blood is a stacking Debuff that deals Physical damage over time. A target can normally have up to ten Corrupted Blood Debuffs, and applying a new stack refreshes the duration of the existing stacks.

skillBlood Hunt

Lunge at a target and skewers them. Hitting an enemy that has suffered Blood Loss will cause a blood explosion and also Consume Bleeding. This skill cannot be Ancestrally Boosted.

skillBloodhound's Mark

Mark a target, making them suffer Heavy Stun build up from Blood Loss. The Mark will Activate, Consuming itself to Trigger Blood Explosion, when they are Heavy Stunned, or when they are killed if they suffered enough Blood Loss. The Mark's duration does not expire while the Marked target is suffering Blood Loss.

skillHerald of Blood

While active, killing an enemy with Blood Loss will cause a bloody explosion that deals Physical Attack damage to surrounding enemies. This damage is not based on your Weapon, but is partially based on their accumulated Blood Loss. The explosion destroys their Corpse if the enemy was Normal or Magic, and has a chance to Aggravate Bleeding.

skillHerald of the Royal Queen

Killing an enemy with Blood Loss will cause a bloody explosion that deals Physical Attack damage to surrounding enemies. This damage is not based on your Weapon Damage, but is based on their accumulated Blood Loss. The explosion destroys their Corpse if the enemy was Normal or Magic.

unique itemAtziri's Acuity

(150-200)% increased Armour

mechanicHeavy Stun

Heavy Stun is the longer disable caused when an enemy's Heavy Stun buildup bar fills. Eligible Hits add buildup based on their damage, and the bar begins to empty after buildup has not been applied for a period.

mechanicHit

A Hit is an instantaneous damage event. Any damage that is not damage over time is Hit damage, whether it comes from an Attack, a Spell, Thorns, or another effect.

Items and gems using this mechanic

1 connections

Direct relationAtziri's Acuity