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 may 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.