Predation

Deals extra damage on attacking the target for the duration

Applied by

A tag names what must come first, such as a skill level.

Stigma skills (1)
- Lifestealing Blade
  - Skill level 10: Predation effect on party members for 20s

Skills that get a bonus from it, or need it. A tag names what must come first, such as a skill level.

Stigma skills (1)
- Lifestealing Blade
  - Skill level 25 (not on Global yet): Predation extra damage lands as a Critical Hit

Does the player who grants Predation get it too, or only the party?

Yes. The player who grants Predation gets it too, not only the rest of the party. It comes only from a specialization. Without that specialization, nobody gets Predation.
Does Predation work on bosses?

Yes. Predation is held by you. With it on, your attacks on a boss can add its extra damage and absorb HP.
Does Predation work in PvP?

Yes. Its extra damage also lands when you hit enemy players, not only monsters.
Does Predation's extra damage go off on every hit?

No. Its extra damage has a short internal cooldown. When you attack fast, only some of your hits add it.