Board Thread:General Discussion/@comment-25417848-20150425222815/@comment-25896389-20150427222808

If I had to guess, I'd say being old as he is, the disembodied entity is what's left of the Sorcerer, though still very powerful  obviously. Dialogue from "the apprentice" seems to suggest that Zoso knew him as flesh and blood though we have no idea how long ago this was. I honestly hope the Sorcerer gets his own arc next season.