In my AU, Michael made the illusion disks to scare CC as a april fools day prank. The disks were set to go off on a timer to active only on that day for a certain amount if time, but something glitched out with the disks and made the timmer not stop the illusion. That glitch also messed with the nightmares and made them scarier then they should of been. I might change this or add somethings later, but this is what I'm using so far.
Yuh, Michael big brain. He did kinda steal some of williams books and what not to build it though. And he cried a bunch trying to build it cause it kept failing on him. Took him a looooong time to do. :)