Fallen Shinobi

Ninjutsu {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 Fallen Shinobi deals combat
damage to a player, that player exiles the
top two cards of their library. Until end of turn, you may play those cards without
paying their mana costs.