Symbiote is not mathematically balanced.

I think its completely balanced by feel.

I think heart of mtn would be pwn with wandering alp.
Especially if you dropped a tunnel complex on it
If you made it work on gnomes it would be way op.

I think thats a good combo.

Added raw power to my list of card that need a buffing.

I'm not sure if this is in your best interest, but I'll give my opinion as well.
Unaligned-
Dimwit Manticore - Doesn't really need a buff, just needs better ai.

Flux Capacitor- Already good as it is. Any more buff would make this thing the next altar of ix.

Null stone - Definitley need improving. It's very hard to time the execution of this card.

Sylvan-

Pixie Queen - Um.... good range, a dimming ability. Not reallly for changing, but I would make it aloft instead of hover.

Belligernet Dryad- Works all too well with Kudzu, Wider Woods, etc... Doesn't need a buff.

Wider Woods - Et to.... I think this was meant for treents.

Celestial Imperium-

Encircling Sea Best use I ever had was with flash flood. Not all too reliable as it is.

Novice Adventurer +1 health so it doesn't die right after it gains experience.

Brigade of the Righteous - Actually, this is like Kobold Warparty, but for all creatures. Possession is all you need.

Mountain Folk-

Heart of the Mountain Lotsa gnomes do exist, but I suggest expanding it to give a minor bonus for all non-Dwarf MF cards (Like just +1 health )

Barrier Peaks-Geomatic Trickster. Nuf said.

Alpine Spirit- I actually think the bear is ok considering the chance of getting mountains near a good start spot.

Dark Legion-

Psychic Parasite- I'd suggest jsut makign the cost 0.

Hollows Eve- No comments.

Balastars Lash - Legs of Baba Yastur pretty much make this card worth a teeny bit more than Foul Obelisk.

Beckon the Bones - Poor player's reanimate.

Hordes of Chaos-

Interference- Maybe lower cost by 1 flux, but seems ok right now.

Defection- I'd liek to actually get somethign decent for that 7 flux I spent, please.

Quorum Stone - I guess it's a domain alternative to mud shelter.

Furnace of Gibil - Chaos version fo Astridian Forum. Actualyl good for gettign those useless cards out of your hands.

Trance Lantern - No comments.

Insatiable Symbiote- Good as it is. Why? You can mess your opponent's creatures up with it.

Summoning Circle- No comments

Crush of the Unknown- Useful for rushing.

Riders of OO'Tong - No comments.

Drunken mortar Team - Can seriously hinder your opponent in the early game if used correctly.

Raw Power - Awesome. Enough said.

Elementals-

Pillar of Fire- Seems like a poor player's Epicenter.

Tailwinds- Extremely useful for gettign slower cards around the map. I wrecked a base once with this just this and an Epic Veteran.

Planar intersection Fire - Dump it in the opponents base and park a high vision creature nearby. Boom, instant rush in a bottle.

Mana Lion- +1 movement and +1 vision would be really helpful.

And by the way, I wonder who Lord Z is .... .