Umitaka, deahts apprentice

Commander ninjutsu{b}{u}{g} gravejutsu {b/g}{u} (put target unblocked creature in to your graveyard
then put this creature on to the battlefield tapped and attacking)
Whenever a creature activate ninjutsu or
gravejutsu return the unblocked creature on to
the battlefield
Ninjutsu and gravejutsu cost {2} less to activate
Creatures in your graveyard have gravejutsu