This spectral claw seems to hiss with necrotic energy and possesses a wispy etherealness, causing it to out of phase with this dimension. This claw deals 1d10 + Charisma necrotic damage and once per day you may take an action to become incorporeal. While incorporeal you may take a bonus action to attempt to possess a creature within 5 ft of you, forcing that creature to make a Charisma saving throw (DC 10 + Charisma) or becoming possessed by you for 1d4 rounds. Once under your control you may command the creature for the duration of its turn, but you cannot compel it to perform an action that would cause itself harm. Additionally, while you are incorporeal you may only attack with this claw. 

Notes: Damage: Necrotic, Requires Attunement Via a Long Rest