School: Evocation [Fire]
Casting Time: 1 Half Action
Range: Medium (100 ft. + 10 ft./CL)
Target: Area within range
Duration: 1 round/CL
Saving Throw: None
Spell Resistance: Yes
An immobile, blazing curtain of shimmering fire springs into existence. The wall is 40 ft. high, and up to 20 ft. long per caster level (maximum of 40 ft. high and 400 ft. long). Alternatively, you may creature the wall as a ring, with a radius of 5 ft. per CL (maximum 100 ft. radius at CL 20).
One side of the wall, selected by you, sends forth waves of heat, dealing 4d6 points of fire damage to creatures within 10 feet and 2d4 points of fire damage to those past 10 feet but within 20 feet. The wall deals this damage when it appears, and to all creatures in the area on your turn each round. In addition, the wall deals 6d6 points of fire damage + 1 point of fire damage per caster level (maximum +20) to any creature passing through it. The wall deals double damage to undead creatures.
If you evoke the wall so that it appears where creatures are, each creature takes damage as if passing through the wall. If any 5-foot length of wall takes 20 points or more of cold damage in 1 round, that length goes away (do not divide cold damage by 2, as normal for objects).