Alchemist Discoveries: Mutagen-Only Variants?

[Doktor Archeville]

Long-time lurker, long-time poster, finally playing my first Pathfinder game tonight. Planning on making a human Alchemist (Beast Form or Vivisectionist variant; I think I could actually do both), and I have a question.

Is there a way to make it so the Discoveries an Alchemist has -- specifically, form-altering ones, like Mummification, Preserve Organs, Tentacle, Vestigial Arm, and Wings -- only manifest when your Mutagen is active? Perhaps it's the remake of SPIDER-MAN coming out, but I'm hung up on the image of a one-armed human Alchemist who, when using his Mutagen, gains Vestigial Arm (effectively replacing the lost limb) and Tentacle (acting as a prehensile tail)...

(I was also thinking of pursuing the Master Chymist PrC, but I've seen posts here indicating it has some problems synergizing with Alchemist levels for Discoveries learned and Mutagen duration.)

[Doktor Archeville]

Anyone?

(And, yes, my first sentence in my original post should be "long-time lurker, first-time poster".)

[Corlindale]

There's not really any way to accomplish that through the rules. Though you could always fluff that you are hiding some of your odd features within your clothes - which then burst theatrically whenever you pop mutagenic form.

Master Chymist gives you a number of powers that only manifest in mutagen form - and contrary to what you have heard it's a quite nice prc, especially for taking only a couple of levels. Duration is not an issue - while 10 levels in Master Chymist means you don't get Persistent Mutagen, it doesn't really matter at all, because you get so many uses per day of mutate that you can effectively be in mutated form whenever it's relevant. You will miss out on some of the cool, non-mutagen related discoveries, though.