Bleeding

Start with a Hit that has Physical damage contributing to Bleeding and an explicit source of Bleeding chance. The base Bleed deals Physical damage per second equal to 15% of that Hit's pre-mitigation Physical damage for five seconds. On monsters, moving or Aggravated Bleeding deals 100% extra damage. Multiple Bleeds can exist, but only the strongest one deals damage at a time.

Application must be explicit

Physical damage does not create Bleeding chance by itself. The Hit needs wording such as chance to inflict Bleeding, inflicts Bleeding, or causes Bleeding. Any skill that Hits can apply it when eligible, including Spells and Thorns, not only Attacks.

Base damage is 15% per second

The base Magnitude is Physical damage per second equal to 15% of the pre-mitigation Physical damage of the Hit that inflicted it. The default five-second duration therefore deals 75% of that contributing damage before the target's later mitigation and damage-taken effects.

Pre-mitigation uses the Hit before defence

Pre-mitigation damage includes the attacker's applicable damage modifiers but is measured before the target's Armour, Block, Resistances, and damage-taken modifiers. Generic modifiers to damage you deal are not applied to the Bleed again after its Magnitude is formed.

Only the strongest Bleed deals damage

Several Bleeding debuffs can remain on one target with independent durations, but Bleeds do not stack their damage. Only the highest-damage active Bleed deals damage, and the next strongest can take over when the current strongest expires.

Movement and Aggravation affect monsters

Bleeding on a monster deals 100% extra damage while that monster is moving or while that Bleed is Aggravated. These conditions do not multiply each other. Since patch 0.5.0, moving no longer increases Bleed damage taken by players.

Aggravation is tracked per Bleed

An Aggravated Bleed remains Aggravated until it expires. Each Bleed is tracked independently: aggravating existing Bleeds does not automatically aggravate Bleeds applied later, while an effect that aggravates Bleeding on a target normally affects all existing eligible Bleeds unless it says otherwise.

The Hit can land on Energy Shield or Mana

Bleeding can be inflicted even if the Hit's damage was dealt to Energy Shield or redirected to Mana instead of Life. Once applied, Bleeding damage itself bypasses Energy Shield, damages Life directly, and cannot normally be redirected to Mana with Mind Over Matter.

Hit-only mitigation does not carry over

Effects that change all damage taken, such as Shock, can change Bleeding damage taken. Effects that apply only to Hits, such as the extra Physical Hit damage from Fully Broken Armour, do not increase the separate Bleeding damage over time.

Other damage types need explicit contribution

Physical Hit damage contributes to Bleeding Magnitude by default. Another type contributes only when an effect explicitly says so, such as Blood Barbs allowing Elemental Damage or Blistering Bond allowing Fire Damage. Contribution still does not create Bleeding chance.

Blood Loss and Incision are separate

Blood Loss records Physical damage over time already taken by the target and can be consumed by payoff skills. Incision instead stacks 10% additional chance to apply Bleeding per stack and is removed when the target becomes Bleeding.