This deck is based around the mono-green devotion decks, but splashes blue for some card draw to fill up your hand once you have already dumped it onto the board. Also Prophet of Kruphix allows you to take twice as many turns, making this deck play at insane speeds.
Cards:
Nykthos, Shrine to Nyx - Allows production of mass amounts of mana with a large devotion.
Voyaging Satyr - A key card in any green devotion deck, that allows you to untap Nykthos, Shrine to Nyx or any other land.
Elvish Mystic and Sylvan Caryatid - Ramp.
Polukranos, World Eater - A great card that we will most likely get out on turn 3 to pose an early threat. Also the monstrous ability provides a great mana sink late-game.
Nylea, God of the Hunt - Gives our fatties trample and we can boost them for a nice game winner.
Arbor Colossus - A 6/6 for 5 that adds three to our devotion, and a monstrosity ability that can easily be used to make him a 9/9. Also is great for shutting out Desecration Demon and Stormbreath Dragon.
Prophet of Kruphix - Allows this deck to play twice as fast and put down insane amount of creatures incredible speeds.
Prime Speaker Zegana - Cast him directly after Arbor Colossus or any other fatty to refill your hand and dump it onto the board again.
Garruk, Caller of Beasts - Use his +1 to get more creatures in hand and his -3 to throw down another beast if your hands already full.
Cyclonic Rift - Fills the role of Mizzium Mortars in the R/G devotion decks. Provides a nice game winner.
This deck is fairly rough and unpolished, but I think it has a lot of potential. All comments and advice are greatly appreciated!