Necromancy [Cold]
Level: Sorcerer 2, Wizard 2
Components: V, S, M
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature
Duration: 1 round/level
Saving Throw: Fortitude negates; see text
Spell Resistance: Yes
You plant a tiny sphere of intense cold in the body of a living creature. On each round on your turn (including the round during which you cast the spell), the target must succeed on a Fortitude saving throw or take 1d8 points of cold damage.
Material Component: A leech and a pinch of snow.
Source: Frostburn, page 97.