Cure Critical Wounds
From HGWiki
Spell
Caster level: Bard 4; Cleric 4; Druid 5
School: Conjuration
Components: Verbal, Somatic
Range: Touch
Area of effect: single creature
Duration: instant
Save: will for 1/2 (when used on undead)
Spell resistance: yes (when used on undead)
Description: Heals (Heal skill)d8 + CL damage, with a minimum of 4d8 and a maximum CL bonus of +20. When used for healing purposes, increases to d10s at CL21 and d12s at CL41.
Notes: Healing spells have a reverse effect when used on undead, causing the targeted undead to take an amount of damage equal to what the spell normally heals. A successful touch attack must first be made when this spell is used against undead.