ancient key in Genshin Impact is a quest item that appears in the story with Virgil from Fontaine. This ancient item is hidden in a chest underwater and opens the way further into the ruins of the Cross and Lily Scientific Society. After the events at the Institute of Natural Philosophy, the Traveler can unravel another mystery of the Hydro region.
In this guide, we will analyze where to find the ancient key in Fontaine, which chest to choose and how to use the quest item.
Where to find the Ancient Key in Fontaine in Genshin Impact
You can find the ancient key only on the instructions of the world "Aqueous Tidemark", in which the hero meets with a strange researcher Virgil and falls into a trap.
How to get the quest Traces of the Tide
Open quest "Aqueous Tidemark" can immediately arrival at Fontaine, it is not necessary to fulfill additional conditions for it. Meet the man in Cours de Fontaine on the fourth floor, where the statue of the Archon is located. Talk to Virgil and start the mission.
How to open a chest with an ancient key
You can get the item only at the stage study of the ruins of the scientific community on a quest with Virgil. To do this, you need to get to the Institute of Natural Philosophy and swim below. Along the way, borrow an ability from xenochromic oscar.
Move deeper and find a chest in the middle of the hall, blocked by several green otters. Defeat them with the acquired Fontmer Blade skill and open the treasury, which will contain the Ancient Key.
It is needed only as part of this mission, it lies in the Inventory in the tab "Exercise". Judging by the description, he stayed in the water for a long time, but they can still open something.
If the key doesn't appear, try checking other places where it might be:
- A chest entangled with algae. Hit the glow on the plant with the blade of the razorback to free the treasury.
- The box with Mora is on the roof of the building in the northern part of the location.
- A box of mora in the seaweed in the southern part of the ruins.
How to use the Ancient Key to open the gate
Follow further along the corridor in the same ruins to the northeast and run into a wall of seaweed. Cut them in three places using the same oscar skill.
Next will be a stone blockage - to destroy it, take the ability from the one crawling nearby xenochrome armored crab and long press hit rocks with skill.
The barrier will be destroyed, and ahead you will notice a locked gate with a mechanism on the left. Swim up to him and use ancient keyto open a passage further. After that, the item will automatically disappear from the Inventory, since it is only needed for the gate at the Institute of Natural Philosophy.
Video guide
We hope this guide helped you learn more about the ancient key from Genshin Impact, how to find and use it. Write to commentsif anything remains unclear. Read the detailed walkthrough "Aqueous Tidemark" and follow Genshin Impact guides on our website.
39k gems in inventory 😵
I searched everywhere and couldn't find the key anywhere! It wasn't in the chests or the seaweed!
Have you launched the quest?
I don't have this quest anymore, I finished it, and even finding the right place is a problem. It's marked very vaguely. Swim down... Where to swim... I don't know.
You can follow the link in the article or swim from the teleport
LOOK, if you've gone around everything and there's no key, teleport to any teleporter, open the quests through the menu, follow the tracks in the sand, hints will appear and after them you'll find the key in this cave
The best advice if you lose your key (like if you've already passed this place and collected the chest like I did) is to teleport back (or maybe even restart the game, but I did that myself, I don't know if it worked or not). Then, from the teleporter, I went down. The quest again told me where to go. Inside the cave, there was some seaweed on the right that needed to be cut down with a special attack (I can't explain it, but I think it's pretty clear). Inside, the key was already there, and the quest would continue.