Walker of Secret Ways (BOK-060) - Betrayers of Kamigawa

Ninjutsu {1} ({1}, 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, look at that player's hand.
{1}: Return target Ninja you control to its owner's hand. Activate only during your turn.