As a Magic action, you can release a burst of negative energy in a 30-foot Emanation centered on a corpse you can see within 60 feet of yourself. Each creature you choose within the Emanation makes a Constitution saving throw against your Maneuver save DC, taking 10d8 Necrotic damage on a failed save or half as much damage on a successful one. Undead you control within the Emanation gains Temporary Hit Points equal to half of the Necrotic damage dealt.
Once you use this feature, you can't use it again until you finish a Long Rest.