Greenbelt Beastshifter

Persist, Mutated 2 (You may have this creature enter the battlefield with 2 -1/-1 counters on it. If you do, its mutated.)
Hulk 2 (As long as this creature has the greatest base power among creatures on the battlefield, it gets +2/+2.)
{t}, Remove a -1/-1 counter from this creature: Add {g}.