Karren Garolas, Silent Master

Ninjutsu {2}{u}{b}
Whenever Karren Garolas, Silent Master or another Ninja creature you control deals combat damage to a player, you may cast target card in that player's graveyard until end of turn.
{3}{u}{b}: Put Karren Garolas, Silent Master from the command zone onto the battlefield, then return a creature you control to your hand.