Evocation [Cold]
Level: Sorcerer 8, Wizard 8
Components: V, S, F
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Targets: One creature/level, no two of which are more than 60 ft. apart
Duration: Instantaneous plus 1 round/level; see text
Saving Throw: Reflex partial
Spell Resistance: Yes
Your breath becomes cold and frosty as you intone this spell, and blue-white crystals erupt from the soil, chill air swirling around their needle-sharp tips.
Razor-sharp ice crystals surround the targets. Each target takes 1d6 points of damage per caster level (maximum 20d6); half of this damage is cold damage, and half is slashing. In addition, each target’s speed is reduced by 20 feet for 1 round per caster level. Creatures that succeed on Reflex saving throws take half damage and their movement is unaffected.
Focus: A silver shuriken worth 50 gp that looks like a snowflake.
Source: Spell Compendium, page 90.