Leonardo, The Still Wind

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

Whenever Higure, the Still Wind deals combat damage to a player, you may search your library
for a Ninja card, reveal it, and put it into your hand. If you do, shuffle your library.
2: Target Ninja creature can't be blocked this turn.