Hey there,
first, congrats on this game! I´ve read its been in development for quite some time, and from what I´ve seen so far (only played it once) the time was well worth it! Since it seems to be really really great!
I just got my own game box (which isn´t easy in europe - please ship more game boxes over here!) and started building my first decks. And since no one else can buy the game, I´m going to make a deck for every class, therefore I´m limited with certain spells.
Walls seem to be pretty handy, esp. for a wizard. We did wiz vs. priestess with the rule book suggest spells as our first match, and her archers were really nasty.
While the Wall of Stone looks fine stat wise, and the Wall of Fire seems to be ok (would be better with at least 10 or also 12 life), the Fog Bank is really pretty weak.
With only 4 life even the incorporeal trait means it wont last longer than one round. The Royal Archer will shoot it down with 2 attacks, with arrows !
Or the Wall of Fire and the Poison Gas Cloud.... shot down by arrows. It´s just a game but still wouldnt it make more sense to give cloud and flame types some form of immunity to non-magical ranged attacks.
While the Wall of Stone takes some time to take down, and will force creatures around it, or hinder their LoS for a while for an investment of 7 mana, the 4 mana for the Fog Bank are a complete waste in my book. Maybe it buys you time if your opponent is ranged only but it seems too situational to be of any generall use.
But maybe I have the wrong picture of walls in this game, since in magic (which I played intensively a long time ago, before the publishers greed ruined their own game) usually a wall was meant to safe your a.. for a while and not just one game round.
So, any1 ever put it to good use ? Because at the moment i think i will give to walls of stone to the wizard, the flame walls to the warlock and the other two will have to do without walls.