A mega-dungeon that supports a full-year campaign. A legendary adventure considered by many to be one of the greatest of all time! Explore a thousand-year-old dungeon mystery waiting to be solved...

This new expansion to Sentinels of the Multiverse explores the heroes, villains, and environments of the Multiverse — those who travel through it, those who have been touched by its vast impossibilities, and those who would seek to destroy it!