Has anyone played around with a crazy idea like that?
My scenario "The Swayvill Letters" has been ran at a few cons, and has the PCs all as demons in service to the Lord of Chaos, meddling in Merlin's affairs on Shadow Earth while Merlin was building Ghostwheel.
All of the PCs were generated using
Shadow Knight's demon system, and are relatively weak compared to any Amberite (or even some of their artifacts).
The first time I ran it, one of the players watched Merlin go to bed, removing something invisible from his wrist and leaving it over the doorknob. He shapeshifted into a super-thin tendril and squeezed his way through the lock assembly, only to be cut in half by Frakir (serving as door-warden).