MetamorphSource Ultimate Intrigue pg. 19
Metamorphs eschew traditional alchemy, focusing on internal chemistry and the transfiguration of living forms.
Class Skills: A metamorph adds Disguise to her list of class skills.
This alters the alchemist’s class skills.
Shapechanger (Su): At 1st level, a metamorph gains the ability to transform herself into another form. This ability functions like alter self, except as noted here. The effect lasts for 1 hour per metamorph’s alchemist level, or until she changes back. Changing form (to another form or back) is a standard action that doesn’t provoke attacks of opportunity. The metamorph is fatigued for 1 round each time she changes shape.
A metamorph can use this ability once per day at 1st level, and an additional time per day at 4th level, and every 2 alchemist levels thereafter, for a total of nine times at 18th level. At 20th level, a metamorph can use shapechanger as a free action once per round, either before or after all her other actions, with no daily limit.
This ability can also function as monstrous physique IUM at 5th level, as monstrous physique IIUM at 9th level, as monstrous physique IIIUM at 11th level, as monstrous physique IVUM or giant form I at 13th level, and as giant form II at 15th level.
This ability replaces alchemy (which also includes bombs, extracts, and mutagen) and Throw Anything.
Mutagen (Ex): At 1st level, a metamorph gains mutagen as a normal alchemist. She can take mutagen and cognatogen discoveries despite not possessing the alchemy class feature that normally grants mutagen.
Adaptive Physiology (Ex): At 3rd level, a metamorph gains a 25% chance to negate critical hits and precision damage, similar to the preserve organs discovery. This chance increases to 50% at 6th level, and to 75% at 18th level.
This ability replaces swift alchemy, swift poisoning, and instant alchemy.