Vault of Monsters is a 5e-compatible adventure rooted in British folklore, full of creatures with personality, lore with attitude, and encounters that escalate without asking permission.

An official OSE supplement of demons, cults, and dark magic.

Tremendous and inspirational resources for gamemasters! Dungeon Denizens 2 is a huge hardcover with 350+ monsters, How to Write Even Better Adventures has advice from experienced game designers, and there's even more!