Leech
Leech (or lifesteal/manasteal) effects convert a percentage of the damage a character deals into mana or life, which goes to fill the character's life or mana pool. Leech modifiers were essential to all physical damage characters in Diablo II,
There is life leech in Diablo III[], though it is much less common than it was in Diablo II. Characters are meant to rely chiefly on health orbs, occasional potions, and a generally greater sense of caution while playing, rather than the huge percentages of life leech (and damage reduction) that made melee combat possible on Hell difficulty in Diablo II. There are various other skills and item modifiers that provide player healing in Diablo III, such as Life After Each Kill.
Some forms of "mana" leech exist in Diablo III, though these differ for each class and are never as simple as the "percent of damage dealt" item modifers that were so common in Diablo II. The issue is complicated by all classes possessing a unique resource (Spirit for the Monk, Fury for the Barbarian, Mana for the Witch Doctor, Arcane Power for the Wizard, and Hatred/Discipline for the Demon Hunter), and different skills and item modifiers custom tailored for the generation or regeneration of their individual resources. See their respective resource pages for more details.
Leech in Diablo III
Leech was quite overpowered in Diablo II, was widely available on all types of weapons and also on many unique and set helms, armors, gloves, belts, and more. This contributed to that game's erratic difficulty curve. Thanks to the ready availability of leech (and to a much lesser extent potions), all well-equipped melee characters in Diablo II could keep their health (and mana) constantly topped off. As a result, monsters needed to be able to kill a character almost instantly in order to pose any real threat.
The Diablo III team has learned from this issue, and besides largely removing potions from the game (and adding in health orbs, they've greatly reduced the frequency of leech. It will be found rarely on equipment, and comes only from a few skills and traits.
There are skills that have life leech ability, and literal life leech affixes. They’re not as crazy as they were in Diablo II. --Diablo
These changes make it much harder for characters to heal and to stay at full health, which makes monsters dangerous again, even if they can't kill a character in one shot.
Leech Sources in Diablo III
No item stats are yet known to provide leech. A few skills and traits do, in limited fashion:
- Revenge -- A Barbarian skill that boosts damage and grants a % of life steal.
- Drain Power -- A Wizard trait that transfers a % of damage done with spell damage to health and Arcane Power.
Formerly:
- Bloodthirst -- A Barbarian skill that provided life leech for a limited duration. Removed from the game during development.
