Pathfinders Only
Location: Nexus
An unofficial little mission. If you've finished the Archon Hunt and are good terms with the three surviving Pathfinders, you'll get an invite to Pathfinder HQ in your email.
Show up in HQ to trigger a little meeting of the fellowship, as you discuss your work, your successors, and the future.
Ends with a toast, but no other reward. You can talk to all the other Pathfinders after to catch up on their progress.