Underrealm Beastmaster

Remove two +1/+1 counters from Underrealm Beastmaster: Create a 2/2 green Beast creature token.
Gravegrowth {1}{b}{g} (At the beginning of your upkeep, you may pay {1}{b}{g}. If you do, put a +1/+1 counter on this creature for each creature
in your graveyard.)