Eraburis

you should consider beastmaster ascension its a strictly better pump in most cases,
also lurking predators does serious work in a deck with >30 creatures.
I know its usually hated on but dovescape can be fun sometimes and definitely fits your theme
aerie worshippers is one of the better inspired card for derevi, it spits out birds and can be abused by derevi's mechanic
If your interested you can have a look at my derevi, it needs to be updated however

thanks, fixd now. was missing ghostway

interesting ill have to pick one up. I love how this deck can replace extremely common versions of effects like e witt with the codex shredder, or ulvenwald tracker with this.

whoops, fixd. Primal vigor doesn't seem necessary to me, the +1/+1 counter part doesn't affect me as much, and if I just want to double tokens more id put parallel lives back in but unfortunately space is very tight on this decklist and I don't know where I'd make room.

cards to look at:
Rakka Mar, Goblin Bushwacker, Goblin Guide, Plated Geopede, Flame Slash, Leyline of Punishment, Banefire, Pyric Ritual, Devastating summons, Elemental Appeal, Hellspark elemental, Searing Blaze, Hell's Thunder.... I could go on but there's a list to start with.