Carrion Frenzy

Make a bite, claw, or weapon attack against one creature. On a hit, deal necrotic or slashing damage. If the target is bleeding, poisoned, frightened, prone, grappled, or below half hit points, regain hit points equal to half the damage dealt.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.