A touch from the character's hand, which glows with blue energy, disrupts the life force of living creatures. Each touch channels negative energy that deals 1d6 points of damage and possibly also 1 point of temporary Strength damage. (A successful Fortitude saving throw negates the Strength damage.) The character can use this melee touch attack up to one time per level.
The spell has a special effect on undead creatures. Undead touched by the character suffer no damage or Strength loss, but they must make successful Will saving throws or flee as if panicked for 1d4 rounds +1 round per caster level.