The Virtuous and the Vile: Morithal, Lord of Unceasing Hunger (Labyrinth Lord) (2012)

From publisher blurb:

Since the beginning of time, the Maggot God has burrowed his way through the earth, indulging a hunger that can never be satiated. Morithal is an artifact from another time, a being who survived the fall of one multiverse and the birth of another. Cursed with a unending desire to consume, He Who Gnaws has hollowed out vast caverns beneath the earth and these have become the subterranean realm of the dark elves, derro, and other depraved creatures. Despite his repulsive nature, Morithal's followers are powerful and many. His cults are everywhere and each of them is tasked with a single goal: to bring about the reign of their god so that he might consume the stars and cast all the worlds of the Material Plane into eternal night.

Inspired by the works of classic writers such as H. P. Lovecraft and Clark Ashton Smith, Morithal, Lord of Unceasing Hunger presents an evil cult that can be easily dropped into any campaign. While designed for Labyrinth Lord this book can be effortlessly used with your old school fantasy roleplaying game of choice.

• An in-depth overview of Morithal, his origins, myths, and other important traits.
• Information on the cults of the Maggot God, their goals, and the benefits of their faith.
• The Famine domain and new spells that honor the power of He Who Gnaws.
• Two new monsters, the walking hunger and the fragment of Paranvoi, who embody Morithal's unceasing need to feed.