This is my take on standard green devotion.
Basic idea is to build mana ramp with Elvish Mystic,sllvan caryatid, and Voyaging Satyr.
Multiple Burning-Tree Emissary with a Nykthos, Shrine to Nyx can create insane amounts of mana early to get out Garruk, Caller of Beasts or anyone other fatties.
Scavenging Ooze is such a great card to help gain life and can become pretty big.
courser of kryphix is a great card to sipher through my cards, gain life, block, draw heat, give devotion. Ok, the card is OP!
2 copies of Arbor Colossus to help against flyers, add devotion, and having monstrosity is nice.
2 Nylea, God of the Hunt is perfect for this deck. Will be a creature super easy and gives everything trample is amazing. The pump ability is just a bonus at this point.
Garruk, Caller of Beasts is very good in getting many green creatures into my hand and being able to play them no problem with the devotion and Nykthos, shring to nyx
I decided Kalonian Hydra over Eidolon of Blossoms because when play testing it seemed to work better having a heavier hitter and to add 2 voyaging satyrs than to have the card draw. Running 3 garruks will typically draw me enough creatures to not need draw. I am not sure if this is the correct move though.
Scry lands to help with... well... scrying of course :)
SIDEBOARD:Still needing some help with what to bring in.
What do you think? Please give constructive criticism.