Colossal Crustacean

When Colossal Crustacean enters the battlefield, destroy target land.
{5}{u}{u}{u}Monstrosity 5. (If this creature
isn't monstrous, put five +1/+1 counters
on it and it becomes monstrous.)
When Colossal Crustacean becomes
monstrous, destroy three lands target opponent controls.