Yuriko, the Tiger's Shadow

Commander Ninjutsu {u}{b} ({u}{b} Return an unblocked attacker you control to its owner's hand: Put
this card onto the battlefield from your hand or the
command zone tapped and attacking.)
Whenever a Ninja you control deals combat
damage to a player, reveal the top card of your
library and put that card into your hand. Each opponent loses life equal to that card's converted
mana cost.