http://www.d20srd.org/srd/spells/walloffire.htmWalloff Ire- Anger at clan Wallof!
No, wall of fire is a classic fourth level spell- it's hard to justify memorizing it, it's extremely useful sometimes, and sort of disappointing much of the rest of the time. At 10th level, "passing through" it deals 2d6+10 points of damage- this averages out to 17, which is very close to the average damage on a successfully saved against fireball or other 10d6 guy.
Unlike most "wall of" spells, this is more a line of damage that is persistent- it doesn't hinder your foes except by dealing damage to them.
It does deal double damage to undead. This actually makes it honestly pretty darn powerful versus undead.
It also lasts for as long as you concentrate on it- if you put it somewhere that fire does damage, like a wooden structure, it's a pretty sure thing that you'll light a blaze.
Overall, we have a spell of somewhat average utility. I would say that it might, in general, be a little too weak- but I'm hesitant to say that, as most of the time my players have not been casting it. Certainly it has the POTENTIAL to be damned good.
But this topic is not about wall of fire!
http://www.d20srd.org/srd/psionic/powers/energyWall.htmThis is a psionic power. It deals d6s at all times (instead of d4s to the folks that are close). Unlike the real wall of fire, it has a saving throw, and doesn't deal extra damage to undead. That's probably why it's only 3rd level as well.
Like all the other psionic energy things, you can pick your elemental flavor- fire and ice deal +1 point of damage per die (aka, 2 more damage total). Ice gets a fort save instead of a reflex save. Sonic does -1 point of damage per die (aka, 2 less damage total). Electricity is harder to save against, with a +2 to save DC.
So, here's the great part: if you make it a sonicwall, it just hammers out sonic energy. This has a much higher abusefactor than fire! You can stretch it along the edge of a castle, and it will eventually pummel down the wall it faces, up to 20 feet long per level and 20 feet high. 2d6+8 points of damage each round is pretty great (for a 10th level guy). The damage ignores hardness (all sonic damage does). So how many hit points does that castle wall have? Stone has, as a baseline, 15 hit points per inch of thickness, so a mighty foot thick wall would last a mere 10 rounds in this example.
Wall of castle destruction!
