Fiery (Stronghold Augmentation)

Fiery: A blazing curtain of magic fire covers one side of the wall, emanating heat in that direction. This augmentation deals damage to those nearby or touching it as a wall of fire.
Any 5-foot-by-5-foot section of wall that takes 20 or more points of cold damage in 1 round is extinguished for 24 hours (do not divide cold damage by 4, as normal for objects).
Caster Level: 7th; Prerequisites: Craft Wondrous Item, wall of fire; Market Price: 14,000 gp.