It may be sensible (depending on where you want to play this deck) to replace the
Forgotten Ancient with something else. This is the only card that is tipping your deck into the Vintage/Legacy category. I see that you are splashing a little bit of deathtouch in your deck with the
Wasteland Viper. Perhaps you could exchange the 2
Forgotten Ancient for 2
Deadly Recluse. Deathtouch is a great delaying strategy to use in a deck (most opponents don't like to attack with deathtouch on the board).
I would be tempted to lose
Gaea's Anthem and replace with
Bladed Pinions. Attaching
Bladed Pinions them onto your deathtouch creatures would be far more effective and can dispose of threats quickly. Far superior mechanic to use in my opinion over the +1/+1 granted from the expensive to cast
Gaea's Anthem.
Might also be sensible to exchange out a few of your heavier casting cost creatures and make your deck slightly more aggro. Having 6 creatures in the 6-8 CMC is pretty hefty; I know you have quite a lot of mana producing elfs etc for the early game play, but don't
forget you're not going to want to use them to block any incoming attacks and by the time your reach turn 4 or 5, you could have taken a fair amount of damage.
Just some food for though.
Good luck with it.