There's some messed up stuff going on here;
Feln Adept ->
Toxic Wisp or
Windscreamer gives you a permanent buff to draw cards every turn. Add
Stormcaller, which helps Feln Adept but also plays really well with Toxic Wisp (deadly pings each turn).
I've updated the deck so that it slants more aggressive. Not sure that's the right way to go, but that way the frenzy enablers add up and you can sneak in a lethal if you're close to the finish line.
Yeah, I don't know if Feln aggro is good in Expedition? I see what you're going for though. I had made a similar deck in Thone. For funsies. It was extremely aggressive but also used a lot of Expedition cards like garote, plunk, Nick, & Through the Unknown. Also used the 1 drop ambush lethrai, and Rat King.
I don't know if Execute or stormcaller are playable, even with the synergy considered. And Direwood Hym IS a great card. Not so much in aggro. And Feln Adept does the same thing so... I would try to lean toward shadow more, or toward primal more to play some influence heavy cards. Kind of like the deck before the tweaks you made. And serpent hive makes the Primal lean easier. Elyn is great too. Why the changes? Also, o forget the name, but there is a Feln unit that changes opponent's creatures stats to 1 when attacking or blocking. Would be great here. Also, might allow you to play a hero-ish version of this deck. In turn allowing you to play the hero-land. Haha, and making you then over think if Zido is right for it...