Screenshot by Creamofgames
In the Light, Beneath the Shadow is a children's puzzle book and, more importantly, one of the five quest items you need to complete the Dragons and Serpents Collection world quest. To get this book, you must have completed The Subterranean Tales of Drake and Serpent, which will allow you to switch Enkanomiya from day to night, and vice versa.
Start by heading to the Dainichi Mikoshi during Evernight and jumping around until you find the Ruin Grader next to the explosive barrels.
Screenshot by Creamofgames
Attack the explosive barrels to blow up the wall behind them, revealing the entrance to a hidden room. The Ruin Grader will also awaken, so be prepared to fight him.
Related: How to Complete Drake and Serpent Trail in Enkanomiya Genshin Impact
Screenshot by Creamofgames
Upon entering the hidden room, you will encounter two triangular mechanisms, a door, and a stone wall. Your objective is to move these structures to reveal the code hidden behind the stone wall. While it's still dark, attack the triangular mechanism A (the one that glows blue) to unlock the door.
Then go outside. You'll find a day-night switch mechanism on a pillar in a crater straight ahead. Activate it to switch Enkanomiya to Whitenight. Then go back to the hidden room and attack the triangle mechanism B to move the stone wall. Once done, exit and switch Enkanomiya to Evernight again.
Screenshot by Creamofgames
Back in the hidden room, you'll find an exquisite chest in front of a white wall. Climb the wall and interact with it to reveal symbols (accessible only during Evernight). The dots next to the symbols indicate the order in which they must be activated in The Serpent's Heart. It is a puzzle similar to that of The Heart of Ouroboros.
Screenshot by Creamofgames
Head to the glade at the Temple of the Heart of the Serpent. Take out the transparent walls from the inside in the same order as the picture above. You must do each step from the inside out and not from the outside in; otherwise the puzzle will not complete.
After successfully passing through all five walls, a cutscene will play and a common chest containing the quest item Into the Light, Beneath the Shadow will appear.
Check out our guide on how to complete Ouroboros Heart in Enkanomiya Genshin Impact if you're having trouble solving this hidden exploration objective.
