Xio, Shadow Recruit

Ninjutsu {2}{u}{u} ({2}{u}{u}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Xio, Shadow Recruit deals combat
damage to a player, you may gain control of
target creature defending player controls until
the end of turn and create a copy of it.
All creatures you control are ninjas in addition
to their other types.