The Ancestor put his experiments on beasts and humans in the Warrens. It’s pretty ancient and mysterious place full of old corridors and monsters. If you make a mistake or the bones glitch out completely, you can go into the settings menu and reload a previous game save to fix the issue.You can explore the Warrens after the Ruins and the Weald. The door will open once you have all three of the skeleton bones attached to the arch. You will need to swing the bones around quite wildly to get them to stick to the archway correctly. Pulling open the boxes around the room will reveal two more sets of bones to use for the arch. There are three sets of bones that you will need to find. Don’t make the same mistake I did bringing the skeleton elsewhere and make it impossible to bring back. Putting all three skeletons on the arch is what you are supposed to do. The video below will show you in greater detail on how to get around this issue. This appears to be where the glitch lies. You can try several times and nothing at all will happen.

If you try to place the bones on the spikes at either side, you may find that nothing seems to happen. The revelio spell will show where the bones need to go. There is a doorway across from the altar that you need to move the bones over to in order to build an archway. You will be able to use a levitation spell to move the bones but there seems to be a bit of an issue.

You will eventually get to a room that contains a pile of bones on an altar in the middle of the room. The quest will send you to some catacombs in search of a relic. After following the rather dark line of Slytherin’s quests with Sebastian, you will get a quest called “In The Shadow of Time”.

How to use bone altar darkest dungeon