Possibly for ceremonial use. There appears to be a circle of reapers or some other kind of strange ghouls or creatures. An upside down skull is presented at center for what could be the centerpiece of the ritual. Eye of Gosh is prominent on the forehead of the skull. It is noted that the same skull also looks to be shown on the page of the book that the creature in the top right is looking at. Cycles of a planet appear to be shown at top center of the page.