Help - Magic Wall Feats!

[Koldun]

Need some quick help finding a rule I thought I had seen somewhere. Does anyone know if there is a feat and/or ability somewhere to cast wall spells (ie force wall, fire wall, etc..) so they only work passing through one direction?

 

[Koldun]

Alright, well one bump for the sake of trying..

Is there no way to pull this off? Am I imagining some feat or ability that would have let me do this?

 

[Jack Simth]

Well, Greater Shadow Evocation can do Wall of Force - and with the (Greater) Shadow Evocation, nondamaging effects have 0 effect on anyone that disbelieves. So if you can beat the Will save of the other guy, and automatically disbelieve your own Greater Shadow Evocation (Wall of Force) (which you can do - you have absolute proof it's not real in that you cast it), then you can cast spells through it (provided you've arranged so that your casting spells doesn't automatically mean the other guy has proof it isn't real - tricky, but it can be done), then the other guy can't reach you (unless he beats a Will save, or uses ranged weapons (as objects, they auto-save) while you can zap away at him.

Really, though - a one-way Wall of Force would be somewhat damaging to game balance. You kill the other guy from perfect safety, each time, every time? Umm....