Pink Slime

Pink Slime comes into play with X +1/+1 counters on it. At the beginning of each player's upkeep, remove a +1/+1 counter from Pink Slime. Every time a +1/+1 counter is removed from Pink Slime, each player must sacrifice a land. If Pink slime has no +1/+1 counters on it, sacrifice it.
"At least you're not eating Black Bile."