Undeath to Death

(Tome and Blood: A Guidebook to Wizards and Sorcerers, DnD 3.0)

Necromancy

Level: ; Cleric 6; Sorcerer/Wizard 6
Components: V, S, DF
Area: Several undead creatures within a 50-ft. radius burst
Saving Throw: Will negates

As circle of death, except that this spell destroys undead creatures as noted above, and undead above 9 HD can be affected.
Material Component: The powder of a crushed diamond worth at least 500 gp.