Turning the familiar into a weapon?

[Ramza Wyvernjack]

I'm just curious if this could be somehow houseruled.
As an alchemist, I'd like to grab the Tumour Familiar discovery, and then the feat that allows better familiars.

If I recall correctly, one of those, a rakhasha type could take the form of any weapon. Think it'd be too strong to allow treating the familiar as a weapon for enchanting and spells purposes.

Would be really sweet to grab a sword or dagger from the chest or shoulder/arm.

[Terquem]

If you can get a copy of it, check out C3 "The Lost Island of Castanamir" for some interesting takes on a similar thing, the Gingwatzim. I used this basic idea to create the main character's girlfriend/weapon in the short story "My Girl the Axe" in Explosive Runes magazine.