Emrakul, Compleated Apocalypse

When Emrakul, Compleated Apocalypse enters
the battlefield, pay an additional {p/c} for each
creature your opponents control. Each player sacrifices a creature.
Flying, infect, protection from noncreature
spells, annihilator 4
Whenever another creature leaves the battlefield,
put a number of +1/+1 counters on Emrakul
equal to the power of that creature.