Walker of Secret Ways

Ninjutsu {1}{u} ({1}{u}, Return an unblocked
attacker you control to hand: Put this card onto
the battlefield from your hand tapped and
attacking.)
Whenever Walker of Secret Ways deals combat
damage to a player, look at that player's hand.
{1}{u}: Return target Ninja you control to its
owner's hand. Activate this ability only
during your turn.