Most green decks want a steady amount of this effect, and you cant go wrong with Guardian Project
Trance ability allows her to mill two cards at the beginning of the combat phase in order to gain flying, which means she can't be attacked except by other creatures with flying
Ulvenwald Oddity / Ulvenwald Behemoth Ulvenwald Oddity is the perfect addition to the mono-green stompy deck
That could be an Elesh Norn, Grand Cenobite or Avacyn, Angel of Hope you're popping into play for the low price of 3 mana and bouncing a tapped creature back to your hand, which is possibly additional upside with the right ETB creatures
Something like Charred Foyer // Warped Space may not be at its best in this deck (as much as I want to, I wont talk about how well thisd fit in a Prosper, Tome-Bound EDH deck), but if you manage to unlock both doors, you essentially have a nice engine that works by itself