Sun of Atom

{w}{b}, {t}: Sacrifice Sun of Atom: Exile target
creature you control with three or more
radiation counters on it. Return that creature
to the battlefield at the beginning of your next
upkeep with an indestructible counter on it.
"A human can transcend morality and straddle
the ether, my son is living proof and the
true apostle of Atom."
—Mother Curie, Leader of the Apostles