Mass Harm
From HGWiki
Caster Level: Cleric 8
Innate Level: 8
School: Necromancy
Descriptor(s): Negative
Component(s): Verbal, Somatic
Range: Touch
Save: Reflex negates, Will 1/2
Spell Resistance: Yes
Area of Effect/Target: Medium
Duration: Instant
Additional Counterspells: Mass Heal
Description: If the caster makes a successful melee touch attack, mass harm uses Negative energy to reduce the creatures in the area of effect which fail their saving throws to 1d4 hit points. This spell has a reverse effect on undead, healing the targeted undead to full health instead of harming them.
Notes
There are some legendary level creatures for which Mass Harm does not have the maximum effect but still can do significant damage.