Admetos, Undead Genius

Admetos, Undead Genius enters the battlefield
with five +1/+1 counters.
Predeploy 1 - {1}{u}{u}
At the beginning of your end step, exile another
zombie you control. Return it to the battlefield
under your control at the beginning of your next
upkeep. If Admetos, Undead Genius has five or
more +1/+1 counters, return it to the battlefield
under your control instead.