Hikaru, Grandmaster

Ninjutsu {2}{u}{b}{r} ({2}{u}{b}{r}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Hikaru, Grandmaster deals combat damage to a player, return all Ninja creature cards from your graveyard to the battlefield.
When you do, untap all other creatures you control and after this phase, there is an additional combat phase.