Centuries ago, forces of good and evil collided in a titanic battle at the mountain fortress of Slaughtergarde. Armies of men, angels, elves, and dwarves fought and defeated a rampaging demon horde, banished its demon prince, and tore Slaughtergarde apart, hurling it back into the Abyss. However, the destruction of Slaughtergarde was incomplete. Parts of the fortress were embedded underneath the Valley of Obelisks, buried for all time. Now, malign forces have found Slaughtergarde's dark chambers, and they toil ceaselessly to restore the magic gates that will reconnect Slaughtergarde to the Abyss. If they aren't stopped, a new demon horde may emerge from the shattered fortress to rampage across the world.This adventure is designed for characters of levels 2-7 and includes a 64-page adventure book, a 64-page campaign book, a 16-page players' book, an 8-page illustration booklet, and a double-sided battle map designed for use with official D&D Miniatures.