How about 5 sessions (or so) of Dungeon World? We can do straight-up DW from the Sparkly Tome if you like, or go with Dark Heart of the Dreamer if that setting riff seems to carry the day (it sure has me intrigued).
Edited: rescheduled to Sunday, October 6 in light of crowded Sundays. Also open to running this at a Thursday night Burial Grounds meetup.
Edited edited: considering a Tuesday night thing at Burial Grounds with no end in sight to occupied Sundays.