Bloodbane

A bloodbane clan dagger is especially vicious against the ancestral enemies of the clan. When you damage an appropriate type of creature with the weapon, that creature takes 1[bleed] damage. The type of creature depends on the clan that made the dagger, but is typically drow, duergar, giant, or orc.

In addition, whenever you inflict persistent bleed damage with a bloodbane weapon (whether from its innate ability or in some other way), the weapon leaves ragged wounds. The bleeding creature must succeed at a DC 25 fortitude save or become sickened 1. The creature is then temporarily immune for 1 hour.