Gallamaxus, Dethroner of Gor

Trample
Gallamaxus, Dethroner of Gor enters the battlefield with two spell counters on it. At the beginning of your upkeep, you remove a spell counter from Gallamaxus. Gallamaxus gets +1/+0 for each spell counter on it. Whenever you cast a spell with converted mana cost 4 or greater, put a spell counter on Gallamaxus. At the beginning of your upkeep, if Gallamaxus has no spell counters on it, transform it.