Bouldergranite Thunderthighs

Indestructible
Frost-touched Blade — {s}: Detain target creature.
Rage — {x}{x}{r}{g}Monstrosity X (If this creature
isn't monstrous, put X +1/+1 counters on it and it
becomes monstrous.)
As long as Bouldergranite Thunderthighs is
monstrous, he has double strike, menace, trample,
vigilance, and must be blocked if able.