Sure, it’s a bit “Supernatural,” but the idea of a crossroads demon making deals seems like a fun thing to add as long as the players have to pay up in horrible ways.
Trace: • Kitchens (sub?)level(s) in the megadungeon • Lizard Man Temple • Beastmen • The Dump • Crossroads Demon
Fumble! You slip into fog of mind and take a round to collect your thoughts.