Level: Bard 4, Blackguard 4, Cleric 4, Druid 5, Healing 4
Components: V, S
Casting Time: 1 standard action
Range: Touch
Target: Creature touched
Duration: Instantaneous
Saving Throw: Will half (harmless); see text
Spell Resistance: Yes (harmless); see text
When laying your hand upon a living creature, you channel positive energy that cures 4d8 points of damage + 1 point per caster level (maximum +20).
Since undead are powered by negative energy, this spell deals damage to them instead of curing their wounds. An undead creature can apply spell resistance, and can attempt a Will save to take half damage.
Source: Player’s Handbook (version 3.5), page 215.