The weave is the fabric of magic which is woven into a pattern surrounding ferun. When you use arcane magic (wizards, sorcerers, arcane tricksters, eldrige knigths) you are accessing and pulling on the threads of the weave to shape the magic and make the "weave" do what you want to do. I don't know if clerical magic uses it or not.
The weave was tended to by Mystra, the Goddess of Magic. She was killed twice, first by Helm when she tried to leave Ferun, then her mantle passed to Midnight who was one of her chosen. She was then murdered by Cyric (and remains dead). When she was murdered the weave partially unraveled during the spell plague and magic became uncontrollable for a period. It was repaired by Elminster and other chosen of Mystra but it is not the same as it was.
Last edited by auburn2; 29/12/20 06:00 PM.