Emrakul, compleated

This spell can't be countered
Shroud (A creature with shroud can not be targeted by spells or abilities)
Flying
annhialator 4
First strike
Emrakul, Completed enters the battlefield with X corruption counters on it. At the beginning of your upkeep, sacrifice Emrakul unless you pay one corruption counter. (When a creature that entered the battlefield with corruption counters on it is put into a graveyard, return it to the battlefield tapped and under its ower's control with a finality counter.