Long ago, a powerful saint gathered dozens of the world's most malignant forces of evil and locked them away in his far-flung warrens behind magically sealed doors.

Today someone opened a door....

This super-dungeon by the author of Return to the Temple of Elemental Evil and the Dungeon Master's Guide takes characters on a dynamic adventure full of intrigue, twists, and magic.

And The Banewarrens is more than just rooms of foul creatures to bash. Characters race against evil adventurers who seek the banes for themselves. With every action, the heroes risk loosing even more hideous forces upon an unsuspecting world. While some may claim to be their allies, amid this deadly labyrinth both figurative and literal:

Who can they really trust?
Throughout the book, discover new monsters and magic, poisons, diseases, and dozens of foul banes like the Phylactery of Forsaken Souls and the Malificite. All these items and creatures are ready-made to drop into your campaign or use in this adventure.

Monte Cook, codesigner of 3rd Edition Dungeons & Dragons, started Malhavoc Press as his own d20 System imprint to publish unusual magic, monsters, and evocative game elements that go beyond traditional fantasy. Malhavoc Press products exhibit a mastery of the d20 System rules that only one of the game's original designers can offer you.