Planescape: Brush with Oblivion
In Brush with Oblivion, slaad from Limbo make war with Ysgard. Too much chaos all in one place tips the balance of the Great Wheel and causes both planes to start sliding into entropy… into nothing. The player-characters are participants in this war, though which side they choose to aid is entirely up to them. This campaign will take them to planes like Ysgard, Arborea, Pandemonium, Limbo, and even the Abyss; to locations such as Sigil, Breidablik, the Seelie Court, the cloud realm of the aarakocra, and Loki’s winter hall.