Lord Zack's Planescape
Limbo is the plane of chaos. It serves as a sort of Transitive Plane between all planes of chaos (the neutral planes touched by chaos, like Tarterus, don’t qualify) but also embodies pure chaos. The Maelstrom of Limbo, a roiling expanse of matter and energy, is the most prominent plane. Other planes exist, but are unstable and may change in unpredictable ways or even dissolve into the Maelstrom. Sentient beings can exert they’re will over the chaos of Limbo, some have especially exceptional powers and are called Anarchs.