Undeath to Death

Ghostwalk (Gh)Supplementals (3.0)
School
Necromancy
Casting Time
1 standard action
Components
V, S, M, DF
Range
Medium (100 ft. + 10 ft./level)
Target
1d4 HD/caster level (up to 20d4) of undead creature within 50 ft. of the target
Duration
Instantaneous
Saving Throw
Will negates
Spell Resistance
Yes

Undeath to death snuffs out the life forces of undead creatures, killing them instantly.
The spell slays 1d4 HD worth of undead creatures per caster level (maximum 20d4).
Creatures with the fewest HD are affected first; among creatures with equal HD, those who are closest to the point of origin of the burst are affected first.
Material Component: The powder of a crushed diamond worth at least 500 gp.
This spell first appeared in Magic of Faerûn.