Bellow-beast

Bellow-beast can't be countered.
Trample, Protection from CMC X or less
Bellow-beast enters the battlefield with X +1/+1 counters on it.
Monstrosity {x}{x}{x} (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
When Bellow-beast becomes monstrous, put X +1+1 counters on each other creature you control and they gain protection from CMC X or less.