End of the Line

Head through the hole in the wall and interact with the portal to enter a new Domain. Choose your party; Treasure Hoarders are the only enemies, so pick characters you are comfortable with.

Upon entering the Realm of Snaring Illusions Domain, a cutscene (a non-interactive cinematic the game plays automatically) will play showing a large compass. You will then see a smaller compass in the ground with Treasure Hoarders. You will play as a trial version of Yanfei. Defeat the enemies in two waves: Wave 1 consists of 2 Treasure Hoarders: Scout and 1 Treasure Hoarder: Crusher. Wave 2 consists of 2 Treasure Hoarders: Handyman and 1 Treasure Hoarder: Scout. Use Yanfei's charged normal attacks, Elemental Skill (Guide to Afterlife), and Elemental Burst (Done Deal) to defeat them.

After the battle, regain control and head east to pick up the Note of Unknown Origin: I. Destroy the sapling to the right of the compass. To find a Common Chest, destroy the rocks to the south by attacking exploding barrels; a chest will appear. Rotate the compass needle forward and proceed through the doorway to the north.

Passing through the doorway triggers a scene where you encounter Fatui. You will then fight alongside Yelan and Yanfei. Wave 1 includes 1 Fatui Skirmisher: Cryogunner Legionnaire and 1 Fatui Skirmisher: Pyroslinger Bracer. Wave 2 includes 1 Fatui Pyro Agent. Start as Yelan and use her Elemental Skill (Lingering Lifeline) to tag enemies, then switch to Yanfei and use her Elemental Skill/Charged attacks for Vaporize damage. When the Fatui Pyro Agent appears, use Yelan's Elemental Burst (Depth-Clarion Dice), then switch to Yanfei and use normal and charged attacks.

Regain control and head east to pick up the Note of Unknown Origin: II behind the mine cart. Head to the compass and rotate the needle forward.