Thread is full of spoilers, don’t go there, just read what I give you:
If there was one last 1st Edition source book what would you want in it?
https://paizo.com/threads/rzs43fzj?If-t ... ce-book#25
I want the Crafty Crafter's Guide to Crafting and Special Materials.
I have always wanted to have rules that did things like base the quality of armor crafted from skins and scales to be based on the natural armor of the creature you used to craft. That way the plated of an ancient red dragon could be used to craft epic armor, while the plates of a juvenile would be less impressive.
Way back in first edition, as I recall anyway, the module "the Village of Hommlet", there was a mage building a tower that had figured out putting succubus blood in the mortar made it impossible to teleport through the walls. I think there could be all kinds of cool little things to do with monster bits, as well as special metals and woods. Does drinking the blood of a grig make you jump farther? Do sails made from phase spider silk allow you to sail into a fabled kingdom?
There could be new classes that use these components, like blacksmiths and hedge wizards. They don't cast magic, they create it like the dwarves in Nordic myths.
Once I am an expert on the rules, I will make this.