Undeath to Death

School: necromancy
Circle: ancient 5th, divine 6th, occult 5th
Spell Components: V, S
Action Time: 1 action
Range: medium
Shape: radius (medium)
Targeting: all undead (radius)
Base Duration: instant
Saving Throw: will
Spell Resistance: no
Ritual Components: n/a

Disrupts the animating principles of unlife over the target area, destroying any affected unliving targets of 10 HD or less. Human-controlled undead will collapse as though suffering deathwatch.