Transmutation [Cold, Fire]
Level: Druid 3, Sorcerer 3, Wizard 3
Components: V, S, M/DF
Casting Time: 1 round
Range: 20 ft./level
Area: 20 cu. ft./level emanation, centered on you
Duration: 1 hour/level
Saving Throw: None
Spell Resistance: No
You imbue an area with cold or fire energy, reducing or raising the temperature by one temperature band per five caster levels. Effects of the new temperature on creatures and the environment are incurred immediately (see Cold Dangers and Heat Dangers).
Arcane Material Component: A drop of mercury.
Source: Frostburn, page 92.