Matheal, the Burning Flame

Persist (When this creature dies, if it had no -1/-1
counters on it, return it to the battlefield under
its owner's control with a -1/-1 counter on it.)
{x}{x}{t}: Matheal, the Burning Flame deals X
damage divided as you choose among any
number of targets, and then deals damage to
itself equal to half X, rounded down.