I don't know if anyone ever played the older Final Fantasy (snes age), but they used to have a Bestiary which would fill every time you fought and interacted with monsters. They would keep useful information such as HP/MP, amount of exp rendered, and most especially, what the monsters COULD drop. I think it would be a very useful feature as well as one that could be easily integrated into the game (especially useful when using the "look" feature). It would also open up the other feature which I'll make for a job.