Gaia, The First Wave

Gaia, The First Wave enters the battlefield with
X +1/+1 counters on it.
Whenever you cast a creature spell with lesser converted mana cost than Gaia, you may put a
land card from your hand onto the battlefield.
Whenever you cast a creature spell with higher converted mana cost than Gaia, draw a card.
Remove X +1/+1 counters from Gaia:
Return target creature with X converted mana
cost you control to its owner's hand.