Goliathin, Jungle Lizard

Vigilance, Trample
Undergrowth—When Goliathin enters the battlefield, put 3 +1/+1 counters on target creature and gains lifelink until end of turn.
Goliathin's power is Equal to the number of creature cards in your graveyard and exile.
Exile {b/g} {t}: Create a 1/1 Jungle Lizard token creature with reach and indestructible.
Whenever you play a gate that provides at least {g}, Goliathin gets +2/+2.