Fungi of the Far Realms + PDF Board Game Legends say it is the

Legends say it is the entrance to the Crypt of Baron Mu-Ye

carry out murderous  tasks assigned to them by their religious leader

Including:

The Book of Gaub book takes inspiration from "floorboard and cobweb" horror

or on fire is a bonus

Fungi of the Far Realms + PDF Board Game Legends say it is theFungi of the Far Realms is a guide to over 200 fantastical mushrooms. Each mushroom is lavishly illustrated in traditional watercolour and annotated by the esteemed fictional mycologist E. Q. Wintergarden, creating a diegetic field guide of such indulgent quality as to put most real world examples to shame. The book is system agnostic, with a mild preference towards your typical fantasy RPG, but is robust enough for most uses you could think of. The