Scourge of the Horsemen

Necromancy [acid, evil]
Level: Cleric */Oracle * 9, Sorcerer */Wizard * 9
Components: V, S
Casting Time: 1 Standard Action
Range: medium (100 ft. + 10 ft./level)
Area: 30-ft. burst
Duration: instantaneous
Saving Throw: Fortitude half
Spell Resistance: yes

This spell blasts the area with a horrific combination of soul-rending energy and physical corrosion. Creatures in the area of effect gain 1d4 negative levels, and take 1d6 points of acid damage per Caster Level (maximum 20d6).