Ninja of the Distant Moon

Flying
Ninjutsu {2}{u}{b}
Whenever Ninja of the Distant Moon attacks,
create a token that's a copy of another target
creature. That token enters the battlefield tapped
and attacking. At the end of combat, sacrifice that
token unless Ninja of the Distant Moon entered
the battlefield this turn.
Whenever another creature you control leaves the battlefield, create a 1/1 black Robot Ninja artifact creature token.