Wildgrowth Archaic (Secrets of Strixhaven)

Creature Ñ Avatar - Trample, reach
Converge Ñ This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.
Whenever you cast a creature spell, that creature enters with X additional +1/+1 counters on it, where X is the number of colors of mana spent to cast it.