Khimug, Flesh Connoisseur

Devour X, where X is the amount of creature types among creatures in all graveyards (as this creature enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with X +1/+1 counters on it for each of those creatures.)
Some say he was born that fat, some say he ate his way through his mother's stomach, many even claim that he was human but became deformed through cannibalism. Regardless he eats.