Bloodthirsty Morningstar 2014

Weapon, rare, (requires attunement)

Rarity: Rare
Category: Weapon
Attunement: Required
Damage: 1d8 piercing

This magic weapon bears long, branching channels inscribed into its blade or head, and it gives off a coppery scent. When you damage a creature that has blood with this weapon, it loses an additional 2d6 hit points from blood loss.

Source: Vault of Magic (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details