After that, I'd ask how powerful is it to give someone a decisive attack they can spam without regard for Initiative that ignores Hardness? That sounds like a great way to kill anyone every fight ever. Something this strong sounds like a "once per scene" sort of deal, or at LEAST with a heavy reset condition, or a complex trigger in the first place. There needs to be some sort of limiter, because if I had this power I'd just wreck everything every combat.
Otherwise, looks cool to me.