Undeath to Death(Player's Handbook v.3.5, p. 297)
Level: Dread Necromancer 5, Cleric 6, Sorcerer 6, Wizard 6, Sha'ir 6, Death Master 6, Urban Druid 6,
Components: V, S, M, DF,
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Area: Several undead creatures within a 40-ft.-radius burst
Saving Throw: Will negates
Spell Resistance: Yes
This spell functions like circle of death, except that it destroys undead creatures as noted above.
Material Component: The powder of a crushed diamond worth at least 500 gp.