Walker of Secret Ways (Spanish) - "Caminante de la ruta secreta" (PSAL-E51) - Salvat 2005

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.