NPC and plothook idea
Ratface the goblin has been insisting he's a human and demanding to go to some city the goblins in his clan are unfamiliar with for around a week now. He won't respond to any name but 'Gregory; or 'Greg', and his siblings Catscratch and Fleabite are getting worried about him. One of the siblings is starting to wonder if they should have raided the stuff from that dead adventuring party since that's when Ratface started acting weird. Ratface/Greg wants to go back to the site and grab more stuff.
Personally, I like the idea of a cursed pendant that slowly transforms the wearer into a wizard/warlock named Gregory. Give him blotches on his skin that match a human skin tone, or come up with another reason for why Ratface is acting odd and go from there.
