Dungeons & Dragons Out of the Abyss

The Underdark is a subterranean wonderland, a vast and twisted labyrinth where fear reigns. It is here that the dark elf Gromph Baenre, Archmage of Menzoberranzan, casts a foul spell meant to ignite a magical energy that suffuses the Underdark, and he tears open portals to the demonic Abyss in the process. What steps through surprises even him, and from that moment on, the insanity that pervades the Underdark escalates and threatens to shake the Forgotten Realms to its foundations. Stop the madness before it consumes you!