Creates a wall of force with DR 24, HP 4.

Innate Attack (Crushing) 8d [84] 
    Area Effect (2 yard radius) [+50%] 
    Persistent [+40%] 
    Wall (Rigid, Shapeable) [+60%] 
    Extended Duration (x1000) [+120%] 
    No Signature [+20%] 
        Invisible wall 
    Selective Area [+20%] 
        Lets through the caster and whoever they specify at casting time 
    No wounding [-50%] 
        No collision damage 
    Can Only be Placed in Arches, Doorways, Portals, etc. [-40%] 
    Only Blocks Spell-Casters [-60%] 
        Just their physical bodies 
        Not their spells or equipment 
        Everything else passes through just fine 
    Magical [-10%] 
    Spell Components [-40%] 
        Must say "wall" in Latin 
        Must sprinkle a pinch of dust from a wizard's tomb 
Level 2+ [+20/level] 
    Increase Area Effect by 1 step [+50%]