Void Fang

Weapon (dagger), rare (requires attunement)

This dagger’s blade is composed of black, bone-like material. Tales suggest the weapon is fashioned from a voidling’s tendril barb. When you hit with an attack using this magic weapon, the target takes an extra 2d6 necrotic damage. If you are in dim light or darkness, you regain a number of hit points equal to the necrotic damage dealt to the target.