ninjutsu 3b (3b, return an unblocked attacker you control to hand: put this card onto the battlefield from your hand tapped and attacking.) whenever nashi, moon sage's scion deals combat damage to a player, exile the top card of each player's library. until end of turn, you may play one of those cards. if you cast a spell this way, pay life equal to its mana value rather than paying its mana cost.