So, I am currently typing out adventure scenarios. One of the elements I like to incorporate is a layered approach to rewards. So, I propose that we develop a foraging based ingredient/treasure that can be harvested from monsters. Earthdawn did an exceptional job of this: listing magical treasure that could be harvested from monsters. This has two effects: 1) it builds in a reason to hunt monsters either for missions or for PCs to do on their own, 2) it helps build the setting by adding a unique element to write the monsters into the mythos rather than just being generic encounters.
Examples: You could harvest chitin from Insectoids like Giant Wasps, Beetles & Ants, poison from spiders, the pelt of a giant cat (enchanted for Stealth?)...just simple things that add a layer to why you are adventuring.
Thoughts?