Badge of Vows 84 is a quest item obtained during the quest From A Different Sky 9. The badge is the remnant of a former Rift Stone, collecting it earns a reward of rift crystals.
- "A badge that glimmers with a mysterious light. Similar medals can be found scattered around Gransys."
The quest will only appear on the Notice Board Post-Game.
This badge is located on the roof of the stables near the southern gate leading in and out of Gran Soren. You will need to climb the tower to the south of the stables and jump onto the nearby building's roof. After you make it there it's an easy drop down onto the stables.