{R} Fallen Shinobi [Modern Horizons][MH1 199]

Ninjutsu {2} ({2}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever this creature 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.