The Ghoulish Library of Leng

Nobody knows where the grinning Librarians of Leng came from. These creatures might be demons, or they might even be living manifestations of the Shadowdark's madness. They have dwelt in the Library since time long forgotten, deep in the darkness, never to be seen by mankind. There, they catalogue the nightmares, terrors, and fears that flow through this dimension. The Librarians of Leng know a crucial fact about every being who has walked this world: what they fear most. To some, there is no greater treasure.