The Ancient Stone Key is a Genshin Impact Quest Item that can be used to unlock a door in the Tanit Camps, revealing a safe where Babel hoarded riches. Here's how to find the Key and how to use it to unlock four Precious Chests.
How to get Ancient Stone Key in Genshin Impact
You must first complete a Sumeru quest chain called Her Foes Rage Like Great Waters..., which follows Jeht's story after your exploration of the Eternal Oasis. Keep in mind that it requires completing all Desert of Hadramaveth quest chains up to Apocalypse Lost.
- Behold, the Sign Comes Like A Thief…
- Make Bright the Arrows, Gather the Shields…
- For Her Judgement Reaches to the Skies…
Once all three are done, return to the Tanit Camps via the Statue of The Seven, then glide down to reach the pavilion where Babel once stood. You'll find a sparkling spot on the brown carpet. Interact with it to obtain Ancient Stone Key.
Related: How to use Mysterious Stone Slate in Genshin Impact
How to use Ancient Stone Key in Genshin Impact
After picking up the Ancient Stone Key, look behind you to find the edge of the cliff. Glide down to the bottom of the area, where you'll find a tent. Across the tent, there's a large door. Interact with the door to unlock it using the Ancient Stone Key. Inside, you can loot four Precious Chests containing 50,000 Mora each.
For more desert collectibles, check out our guide on All 6 Mysterious Stone Slate locations in Genshin Impact here on Pro Game Guides.
