Advachiel, the First Harvest

Champion one or more green permanents.
If the devotion to green of permanents championed by Advachiel, the First Harvest is greater than or equal to X, where X is the number listed below, Advachiel has the following text:
-2: {t}: Create a 0/1 green Plant creature token.
-4: Other creatures you control have "{g}, {t}: Untap another target permanent."
-6: When Advachiel becomes tapped, put X +1/+1 counters on it.