Evocation [Cold]
Level: Druid 5
Components: V, S
Casting Time: 1 round
Range: Long (400 ft. + 40 ft./level)
Area: 10 ft.-radius/level spread
Duration: Instantaneous
Saving Throw: Reflex half; see text
Spell Resistance: No
This spell may only be cast outside. Immediately upon completion of the spell, an avalanche of ice and snow falls out of the sky, dealing 8d6 points of crushing damage and potentially burying Large or smaller creatures within the area. Creatures making their Reflex saving throws take half damage and are not buried. Those that fail their saves are buried.
Buried creatures and take an additional 1d6 points of nonlethal damage per minute while still buried. If such a creature falls unconscious while buried, it must make a DC 15 Constitution check. If that check fails, it takes 1d6 points of lethal damage each minute thereafter until freed or dead.
The ice and snow remains until melted by natural or unnatural means. A rapid melting of the ice and snow could cause a flash flood (see Freezing and Thawing).
A 9th-level caster buries Large or smaller creatures. At 12th level, the maximum size of a creature increases to Huge. At 15th, Gargantuan creatures are also buried, and at 18th level, a creature of up to Colossal size is buried by the snow.
A buried creature can free itself with a DC 25 Strength check, or can be dug out by other creatures. In 1 minute, using only its hands, a creature can clear ice and debris equal to five times its heavy load limit. The amount of tightly packed snow that fills a 5-foot-by-5-foot area weighs 500 pounds. Armed with an appropriate tool, such as a pick, crowbar, or shovel, a digger can clear loose ice and debris twice as quickly as by hand.
The snow avalanche extinguishes all flames, whether normal or magical, it touches.
Source: Frostburn, page 90.