Act I: Vortex's Wake

Head to Guyun Stone Forest: First things first, teleport to the Guyun Stone Forest Waypoint. You'll want to go a little bit east from there to trigger a cutscene. Zhongli will mention how the ancient war left behind a lot of relics, probably marked with Elemental Marks. Keep an ear out for that!

Search for Relics with Elemental Sight: After the scene wraps up, make your way to the island southeast of your current location. Once you're there, activate your Elemental Sight. You're looking for those elemental marks we just heard about. Keep moving forward, and you'll spot a chest that's being guarded by some Hilichurls.

Defeat Enemies and Grab the Chest: Time to fight! For the smaller enemies, try using Hydro followed by Electro – it's super effective. Then, switch to Pyro to deal with the Wooden Shield Mitachurl; this will break its shield nicely. Once they're all down, open that chest to snag a Used Training Dummy.

Keep Searching with Elemental Sight: Now, head to the southeast corner of this island. Activate your Elemental Sight again. You're looking for a box that's floating in the sea, just behind a rock. Swim over to it and grab it – you'll get a Crude Sack.

Defeat Mimic Monsters and Recover the Relic: Let's move on to the next island, which is to the south. You'll find some mimic monsters here. They're the same kind you fight in the Oceanid boss battle, so use the same strategy. Once you've defeated them, you'll get a Mysterious Stone Tablet.

Meet Up with the Others: Finally, head west. You'll meet up with Kliment and Wanyan. There's a bit of a scene where they're bickering, followed by some more dialogue. Once that's done, the quest will wrap up!