Kuro, the Shadow Blade

Ninjutsu {u}{b} ({u}{b}, Return an unblocked attacker
you control to hand: Put this card onto the battlefield
from your hand tapped and attacking.)
Whenever Kuro deals combat damage to a player,
you may exile target creature card from their graveyard.
{u}{b}, Sacrifice another creature: Kuro gains indestructible until end of turn.