Mondo Levidian

This spell can't be countered.
Hexproof, trample, islandwalk
At the beginning of your upkeep, conjure a card
named White Zoa into your hand.
When Mondo Levidian leaves the battlefield,
exile X target creatures equal to its power. Those
cards remain exiled as this creature changes zones
other than the battlefield. When Mondo Levidian
returns to the battlefield, return all cards exiled
with Mondo Levidian to the battlefield.