Aura Of Cannibalism

Necromancy [evil]
Level: Artificer * 3, Cleric */Oracle * 3, Sorcerer */Wizard * 3, Warlock * 3
Components: V, S, M (a piece of flesh from another creature of your species)
Casting Time: 1 Standard Action
Range: 20 ft.
Area: 20-ft.-radius emanation, centered on you
Duration: 1 minute/level (D)
Saving Throw: Fortitude negates
Spell Resistance: yes
  You emanate an aura that saps the Strength of others of your kind and channels their energy into you. Each round that a creature starts its turn in the spell's area and shares both your creature type and at least one subtype you possess (if any), that creature must succeed at a Fortitude Save or take 1d4 points of damage. You gain a number of temporary hit points equal to the amount of damage you deal with this spell (maximum 10 + your Caster Level). These temporary hit points go away when the spell ends. As long as you have at least 5 temporary hit points while this spell is in effect, you gain a +1 Competence Bonus on attack rolls, saving throws, and skill checks. If you have 15 or more temporary hit points, this Competence Bonus increases to +2.