Ryoshu

First strike, Ward - Pay 3 life.
Ninjutsu {b/r}{b/r}{b}
When this card deals damage to the opponent,
it perpetually gets +1/+0.
When you sacrifice a creature, you may put Ryoshu from your graveyard to your hand. If
you do, it perpetually gets {b/r}{b/r}{b/r} to its cost.