Graze

School necromancy [injury]; Level champion 1, cleric/oracle 1, inquisitor 1, occultist 1, shaman 1, spiritualist 1, witch 1
CASTING
Casting Time 1 standard action
Components S
EFFECT
Range touch
Targets creature touched
Duration instantaneous
Saving Throw Will half; Spell Resistance yes
DESCRIPTION
You lay your hand upon another creature and channel necrotic energy that deals 1d8 points of necrotic damage + 1 point per caster level (maximum +5), manifesting wounds on them from pure entropy.

Since undead are powered by necrotic energy, this spell heals such undead and other creatures powered by necrotic powers by the same amount of damage, rather than harming it.