Transmutation [Cold]
Level: Cleric 6, Druid 5
Components: V, S, M$
Casting Time: 1 standard action
Range: Touch
Target: Creature touched
Duration: 1 hour/level
Saving Throw: Will negates
Spell Resistance: Yes
As you touch the creature, a chill sweeps through you and down your arm. As the spell takes effect, the creature’s body changes hue, becoming an icy blue.
The subject creature gains the cold subtype, granting it immunity to cold and vulnerability to fire (the creature takes half again as much damage from fire effects). A fire creature subjected to this spell does not gain the cold subtype, but it loses the fire subtype for the duration.
Material Component: A pinch of sapphire dust worth 10 gp.
Source: Spell Compendium, page 138. First published in Frostburn, page 101, as a permanent and much more expensive spell.