Accidentally introduced Szass Tam into Tyranny of Dragons....

TL;DR Cult of Dragon / Wizards of Thay have captured my level 19 party. Meant to have cult leader be the mastermind (which would have made plenty of sense) but “accidentally” had the leader of all of Thay be there instead. Looking for good story-hook to have him involved to keep from having to retcon half a session (and...