Sense Vitals

Divination
Level: Antipaladin* 2, Artificer * 2, Bard * 2, Hunter * 2, Ranger * 2, Sorcerer */Wizard * 2
Components: V, S, M (a drop of blood)
Casting Time: 1 Standard Action
Range: personal
Target: you
Duration: 1 round/level
Saving Throw: -
Spell Resistance: -
  This spell makes your eyes shine blood red and allows you to see the vital areas and weak points of creatures within 30 feet of you as a warm glow. This allows you to use any Manufactured Weapon to make sneak attacks, as the rogue ability of the same name, dealing an additional 1d6 points of damage; this additional damage increases by 1d6 for every 3 Caster Levels you possess beyond 3rd, to a maximum of +5d6 at 15th level. This additional damage stacks with other sources of precision damage.