Furious Mouth of the Spring is a Genshin Impact World Quest in The Wild Fairy of Erinnyes quest chain. It immediately unlocks after completing the first part of the series: Foggy Forest Path.
In this segment, you must head to Loch Urania and find a way to search for the key near the Mouth of the Spring by solving an underwater puzzle. Follow the steps below to complete it.
How to Search for the "key" near the "Mouth of the Spring" in The Wild Fairy of Erinnyes – Genshin Impact
Upon starting the World Quest, head to Loch Urania to find a wide area highlighted in the mini-map and World Map. Head to the southern part of the highlighted area and dive underwater to find three Contaminated Bacterial Mats (purple rocks).
You'll find a Xenochromatic Armored Crab nearby. Absorb its ability, which can be used to get rid of the Contaminated Bacterial Mats. Hold the Xenochromatic Armored Crab's ability to target a Contaminated Bacterial Mat, then release the button to destroy it.
If you're having trouble, I suggest targeting the core of the Contaminated Bacterial Mats (center) and attacking them in close range to ensure the ability hits.
Once all three Contaminated Bacterial Mats are destroyed, the purple liquid on the ground will disappear. Swim northward to find a current, then enter it to get swept to the opposite side of the tunnel.
There's only one Contaminated Bacterial Mat on this side. Get rid of it using the Xenochromatic Armored Crab's ability to complete the objective. If the nearby Bullet Barnacle gets in the way, get rid of it using the same ability. After destroying the purple rock, a short cutscene will play, indicating that you've completed the puzzle.
When the cutscene ends, swim inside the tunnel to find an altar with a glowing spot. Investigate the altar to continue with the quest. You'll shortly be teleported to the surface, where you must defeat the Enraged Vishap to trigger dialogue with Pahsiv, completing the World Quest.
To complete the next part of the quest chain, check out our Genshin Impact Within the Depths of Erinnyes World Quest Guide – The Wild Fairy of Erinnyes here on Pro Game Guides.
Nicki is a freelance writer with 5 years of writing experience. She's a fan of anything from HoYoverse, from Genshin Impact to Tears of Themis and Honkai: Star Rail. She also loves rhythm games like BanG Dream! and D4DJ.