Gruumsh Incarnate

Menace
{x}{b}{b} Monstrosity X: (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous).
When Gruumsh Incarnate becomes monstrous, it deals X damage to target creature, where X is the amount paid for its Monstrosity cost.
"Join me or perish as shadow."-Gruumsh Incarnate