Leech is a minor attribute introduced in Warlords of Draenor. Leech causes a player to instantly return health from both outgoing damage and outgoing heals. The amount of health returned is equal to your amount of Leech, 1% of Leech will return health equal to 1% of your damage and healing done.
As an attribute, any Warlords-level or higher gear, looted or crafted, has a slight chance to be itemized with Leech.
Additionally, Leech is present on certain class abilities, buffs, enchants, and temporary effects.
Notes[]
- Leech healing is generated immediately upon a successful attack or heal.
- Leech healing itself cannot critically strike.
Patch changes[]
Patch 10.1.0 (2023-05-02): Leech rating now gives 25% less Leech stat. 
Patch 6.1.0 (2015-02-24): Leech rating now provides about four times as much benefit per point. - Patch 6.0.2 (2014-10-14): Added.