A quest called “Follow the Water’s Flow and Search for the Source of the Foul Energy” is a pretty complex quest that you get to do inside The Chasm’s Maw. This quest will require you to follow a water stream until you find a big mushroom and get to the source.
This guide will show you how to complete the “Follow the Water Flow and Search for the Source of the Foul Energy” quest in Genshin Impact.
Genshin Impact: Follow The Water’s Flow And Search For The Source Of The Foul Energy
The quest will begin right at the giant mushroom tree that is located south of The Glowing Narrows.
From there you will get the quest and will need to follow the water flow. The tricky part is that you don’t know which one it is.
Simply follow the image shown, follow the red lines and you will reach the source of the foul energy.
Once you reach the area, Paimon will speak to you and explain what the foul energy might be. From this point, the quest will be marked as normal and you can continue completing it.