Annul is an enemy ability used by Gespenst, Gazer, Etém, Nightwalker, Reaper Claw, Reaper, Oversoul, Deathscythe, Ixtab, Demon Wall (Outer), Demon Wall (Inner), Dustia, Ishteen, and Negalmuur. It reduces the MP of one party member to 0 within a range of 10 and a CT of 3. Of note, it is Dark-elemental.