Unbreakable Bond

From: Professor
Description: The person who crated this Airship Dock was a genius! I would never be able to recreate their work, but I think I've found another way to make a signaling device. And the mages have agreed to help me. Bring me a few artifacts, and Martha and the Mistress will do what my tools can't.
Completed: Martha and the Mistress are working together as if there are no disagreements between them... They call upon the power of the City to absorb the artifacts and give us... Yes, that's it. The Signaling Mechanism! We did it! Now you can always come back.