The Real Omnitrix

Indestructible
Creatures you own named Ben 10,
Omniversal Hero have "{x}: Exile this creature.
Then return it to the battlefield as a copy of up
to one Alien permanent card you own in exile
with mana value X until your next turn,
except its name is still Ben 10, Omniversal
Hero. It gains haste."

{t}: Exile target Alien spell or permanent you
own. You may cast an Alien card you own
from exile this turn.