That was precisely my thinking. 'Shadowlords' was just a name I came up with to denote those uber-powerful lords of the SF. 'Archsorrowsworn' is the same type of name (although a bit unwieldly, if not technically correct.)
Now that I think about it, it would be an interesting way to go about making the Archfey-equivalent for the Shadowfell be beings that are "trapped" there. In the Feywild you have Seelie and Unseelie, good and bad fey. In the SF you could have Sorrowlords and Darklords-- untrapped ones and trapped ones. The trapped ones could very well be more powerful that the untrapped ones because the SF has configured itself to their domain of dread to grant them much more absolute power than what the Raven Queen (and others) can wield. The only problem of course being that they can't leave their domain. And I also believe that Darklords absolutely should be valid patrons for warlocks, because why not?![]()
Shadowlords as title and Archsorrowsworn as discription.