Complete The Oathbound by defeating the Eternal Guardsmen across the regions and collecting their emblems and Mysterious Stone Pyramids. The completed set becomes a Mysterious Stone Slab, which opens the marked wall near Fortress Courtyard. Read the note inside the hidden room to finish the quest.
Start the quest and track the emblems
Defeating an Eternal Guardsman begins the quest. You do not need to meet them in a fixed order, and some locations require abilities gained later. Use the region and nearby Lantern to identify each destination rather than treating the first guard you encounter as the start of a mandatory sequence.
| Emblem | Region | Starting landmark |
|---|---|---|
| Valen Duroc | The Battlefield | Onslaught Arch |
| Lucien Lafontaine | Valley of Ashes | Demolished Path and the lift shortcut |
| Jean Pierre Polnaire | Caverns | Old Mine |
| Etienne Vauclair | Fallen Village | Marketplace |
| Severin Susse | Cursed Hollow | Deep Water |
| Adrien | City of Orphans | River shortcut and poison passage |
| Bastien Beaufort | Fortress | Courtyard |
Battlefield and Valley of Ashes guards
At Onslaught Arch, turn back and climb the cliffs, passing the camp to the split near the enemies. Find the glowing weak point on the wall and shoot it with the Pistol to reveal the guard’s area. Defeat him for Valen Duroc’s items. The chest behind him contains Duellist’s Focus.
In Valley of Ashes, use the shortcut route near Demolished Path. Follow the plague vines back down, then take the side path behind the group of enemies toward the marked guard area. Lucien Lafontaine drops his emblem and a stone piece; check the chest behind him for Perfectionism.
Caverns and Fallen Village guards
From Old Mine in Caverns, reach the crane and moving crate. Use Stasis to hold the mechanism while positioning the crate, jump onto it and release it to reach the upper platform. Follow the route into the guard’s cave. Defeat Jean Pierre Polnaire and open the nearby chest for another Perfectionism pickup.
The Fallen Village guard requires a return after you can interact with the Nephtoglobin platforms. From Marketplace, backtrack through the carriage and take the left branch at the intersection. Follow the traversal route through the platforms, wall-running surfaces and grapple points to the cave. Shoot the glowing weak point to open the last approach, then defeat Etienne Vauclair. The chest in this area contains a Pure Transmutation Material.
Cursed Hollow and City of Orphans guards
From Deep Water in Cursed Hollow, progress toward the straight path before the church. Near the round hay-bale area and cannon enemy, investigate the side route around the nearby building and island. The guard is beside the building. Defeat Severin Susse and inspect the chest behind him for Life Diverted.
For the City of Orphans guard, return with Shield so you can cross the poison passage near the river shortcuts. Follow the ramp and side route through the toxic area. Work around the building, climb through its damaged wall and shoot the weak point to open the final path. Defeat the guard and collect the emblem and stone piece. The chest contains Superior Firearm Parts.
Fortress guard and the Mysterious Stone Slab
From Fortress Courtyard, enter the hallway beneath the hanging flag. In the large room beyond, turn toward the monster-like Eternal Guardsman and defeat it. Inspect Bastien Beaufort’s body afterward to obtain the final quest items.
Once you have the complete set, the Mysterious Stone Slab becomes available. In the same area, search the opposite side of the room for the wall bearing the Oathbound symbol. Interact with it using the slab to open the hidden chamber.
Read the final note and collect the chests
Read the paper on the table inside the chamber to complete The Oathbound and unlock We Wear the Same Colours. Open the room’s chests as well: the final rewards include an Empty Ferrofluid Flask and Quintessential Blade Material.
If the wall remains closed, check that you collected each guard’s quest items, including inspecting Bastien after the Fortress fight. Reaching the chamber entrance alone is not the final objective; the note inside completes the quest.