Mark of Shinobi

You may choose up to two of your commanders.
They start the game face down in the Command
Zone.While a Commander you own is face
down, they have Commander Ninjutsu {3}{c}.
({3}{c}, Return an unblocked attacker you control
to hand: Put this card onto the battlefield from
your hand or the command zone, face up, tapped
and attacking.)
(Your commander may normally bear only one of
each type of Regalia.)