Raiden, Cyborg Ninja

Ninjitsu{u}{b}{r}, Doublestrike, Lifelink, Shroud
Whenever Raiden deals combat dammage to
a player, you may search target players
battlefield, hand, and library for a legendary
creature. You may have Raiden fight that
creature. A creature that dies this way is exiled.
Return Raiden to it's owners hand at the
beginning of the end step.