Yurnero, the Juggernaut

{x}{r}{g}: Yurnero, the Juggernaut deals X damage
to each creature your opponents control and
gains hexproof until end of turn.
{x}{1}{r}{r}: Exile Yurnero, the Juggernaut. He
deals damage equal to his last known power to
target creature. Repeat this X number of times.
The same target may be chosen more than once.
Then return Yurnero, the Juggernaut to the battlefield under its owner's control. Activate
only during your turn.