Akiko, Shadow Queen

Ninjitsu {2}{u}{b} ({2}{u}{b}, Return an unblocked
attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever one or more Ninjas deal combat
damage to a player, if Akiko entered the
battlefield this turn, look at that many cards
from the top of that player's library. You may
cast one card from among them, then put the
rest on the bottom of their owner's library in a
random order.