Not sure how relevant or important is this, but lets say you have 30 MP and use an attack that uses 30 MP (i.e. Avenger). The animation will go off, MP will go to 0 and then back to 30, but no damage will happen. This also happens with basically any damaging ability, but other abilities still work (i.e. Flash Jump at 13 MP), so you can spam FJ until natural MP regen kicks in. Thought you would like to know