Patreon site and DriveThruRPG. It is a PWYW "mission" of sorts that is pretty much player-driven.
The idea is the party needs to access a Sage for advice and there just so happens to be a knowledgeable, and approachable, wizard that can do the job. He is just a hop, skip, and a jump away* and can try to answer just about any question (actually he can).
The whole idea actually sprang from an idea for a new "monster", which really wasn't needed in this Tweak & Toss and might be available later as some bonus content.
*Ok, more like a trek and a canoe ride, but still.....