The Beast

When the beast enters the battlefield create the
Dark Lantern, a legendary equipment artifact
with "{3}: Attach the Dark Lantern to target
creature an opponent controls. Activate only as a sorcery." and "You control equipped creature."
and "As long as the dark lantern is equipped to a creature, creatures you control named The Beast
have protection from everything."
at the beginning of your end step sacrifice an artifact, if you can't sacrifice The Beast.