You phase your hand into a creature’s body and attempt to tear away a fragment of its soul. The creature must make a Charisma saving throw. On a failure, it takes 4d10 necrotic damage, you gain temporary hit points equal to half the damage taken, and you gain advantage on the next attack roll, ability check, or saving throw you make before the end of your next turn. On a success, the creature takes half as much damage, and you don’t gain any benefits. Creatures without souls automatically succeed on this saving throw.