The Weave is a prime+material theory on the inner workings of magic. It stipulates that magic functions as a tightly woven carpet of some kind. Say that to the mages of Limbo, and you're bound for the nest of the nearest Death+Slaad.
The cleaner of the Weave is known as Mystra.
Are you SURE this isn't the elemental plane of salmon? It really looks the part.
— First impressions of Limbo