The final realm is Yon, a mountainous region of crystalline peaks and freezing winds. Here, the contrast is sharpest—the landscape is beautiful but deadly. Ruled by the eldest hag, Endelyn Moongrave, Yon is a place of apocalyptic omens. It draws heavily from classic folklore, including nods to Jack and the Beanstalk , serving as the climax of the adventure before the players confront the heart of Prismeer.
The Feywild is often described as a "reflection" of the Material Plane, but brighter, sharper, and more chaotic. The Wild Beyond the Witchlight focuses on Prismeer, a distinct domain within that plane. Prismeer is divided into three thematic realms, each controlled by one of the three hags of the Hourglass Coven. The Wild Beyond The Witchlight
The three hags are the backbone of the adventure. Unlike the cliché "cackling evil" witches, these hags are dysfunctional sisters. The final realm is Yon, a mountainous region