Mytimidon, World Ender

First Strike, Trample, Reach, Defender
{6}{r}{g}: Monstrosity 6. (If this creature isn't monstrous, put six +1/+1 counters on it and it
becomes monstrous.)
As long as Mytimidon, World Eater is monstrous
he can attack as if he didn't have defender and
gains Vigilance.