Transmutation [Evil]
Level: Sor/Wiz 1
Components: V, S
Casting Time: 1 action
Range: Touch
Target: One living creature
Duration: 10 minutes/level
Saving Throw: Fortitude negates
Spell Resistance: Yes

The caster transforms one creature into an aberration. The subject’s form twists and mutates into a hideous mockery of itself. The subject’s type changes to aberration, and it gains a +1 natural armor bonus to AC (due to the toughening and twisting of the flesh) for every four levels the caster has, up to a maximum of +5.

Special: Sorcerers with the Infernal or Abyssal Bloodline cast this spell at +1 Caster Level.

(BoVD, p84)