Serizawa Street Regulars

Ninjutsu {x}{x}{r} ({x}{x}{r}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
When Serizawa Street Regulars enters the battlefield, create X 1/1 black and red Ninja
creature tokens.
Serizawa Street Regulars' power and toughness
are each equal to the number of Ninjas you
control.