Queen's Domain: To Find Lost Treasures.

What you need to know

The “Glimmering Treasures” achievement does not require every display slot in the shop to be filled. One chair and one hanger are intentionally left empty as a fake‑out. The only item you still need to locate is the missing Mystic Mirror, which is hidden in a secret room behind the skeleton that bangs on the wall in the queen’s castle laboratory.

Step by step

1. Check the shop displays – Verify that the three chairs contain a silver compass, a skull, and one empty slot. Likewise, confirm the four hangers hold a holy bone, a cursed bone, a mirror, and one empty slot. Do not worry about the empty spots; they are part of the achievement’s design.
2. Locate the laboratory – Head to the queen’s castle and find the laboratory area. Look for a wall where a skeleton repeatedly bangs against it.
3. Trigger the secret passage – Stand close to the banging skeleton and interact with the wall (or simply wait for the skeleton to create an opening). A hidden doorway will appear behind the skeleton.
4. Enter the secret room – Walk through the newly revealed opening. The room is unmarked on the map, so rely on visual cues: a small, dimly lit chamber directly behind the skeleton’s position.
5. Find the Mystic Mirror – Inside the secret room, locate the Mystic Mirror placed on a pedestal or leaning against a wall. Pick it up to add it to your inventory.
6. Return to the shop – Go back to the shop and place the Mystic Mirror on the empty hanger slot. This completes the required items for the achievement.

Tips

• The empty chair and hanger are not bugs; they are meant to stay empty, so you can ignore them.
• If you fall out of bounds, reload the last checkpoint before entering the laboratory to avoid sequence‑breaking the hidden room.
• The skeleton’s banging animation is the only indicator of the secret passage; there is no separate lever or button.
• Keep an eye on your inventory after retrieving the Mystic Mirror to ensure it registers correctly before placing it in the shop.