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Genshin Impact A Lamenter at Fate’s End Unknown Sanctuary walkthrough – Caribert Archon Quest

The Khaenri'an who worships no god kneels in front of a Sinner.

The Genshin Impact Archon Quest Chapter III: Act VI - Caribert tells of the chilling tale of a Khaenri'ahn named Eide and his quest to save his Hilichurlian son, Caribert. After completing Fortune-Mocking Pedigree, you'll automatically unlock the next segment called A Lamenter at Fate's End. It involves following a Hilichurl to an Unknown Sanctuary, where a Sinner compels Eide into worship.

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In this quest, you won't be able to configure your party in the open world or access the World Map. Consider turning on quest navigation to make things easier for you.

How to enter the Unknown Sanctuary in A Lamenter at Fate's End – Genshin Impact

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As soon as the quest starts, glide down from the Statue of The Seven, and head toward the pathway under the arch, pictured above. Once there, follow the path until you reach the glowing spot, which will trigger a dialogue with Eide.

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Keep following the path and watch the Hilichurl go through a barrier. Get close in order to trigger a glowing spot to appear in front of the barrier, which you must interact with to enter the Unknown Sanctuary.

All puzzle solutions & Chest locations in A Lamenter at Fate's End Unknown Sanctuary – Genshin Impact

Important: Party setup

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Once inside the Unknown Sanctuary, climb the stairs and follow the path forward. You'll unlock a Door of Resurrection, which you can interact with to change your party setup. You need a character that can break strong Cryo shields for an upcoming battle. We recommend choosing a Pyro or Electro applicator.

Related: Genshin Impact Behold, the Sign Comes Like A Thief… World Quest guide – Her Foes Rage Like Great Waters…

Common Chest #1

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After configuring your party, keep following the path forward to enter a wide room. Immediately turn your attention to the beautiful Common Chest on the right. Loot it for rewards, then defeat the hoard of Hilichurls attacking you.

Common Chest #2

Once this room is clear, turn left to enter another room. Inside, climb the stairs to find a purple, galaxy-like portal. Go through the portal to enter it. Inside this glittering space, simply wait for the environment to change. When you're transported into a new but similar-looking place, walk a few steps forward to trigger dialogue and a small cutscene.

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After the cutscene, some Slimes will spawn around you. Defeat all of them to pave the way forward. You need to climb the stairs upward to find another purple, galaxy-like portal.

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Don't rush into the portal immediately—there's a Common Chest right in front of it! Loot the Chest, then enter the portal and wait for the environment to change.

Rune puzzle + Exquisite Chest

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You'll find yourself on a bridge. Follow the path forward and climb the stairs to find a door that's slowly opening. Once it's open, pass through and climb the massive staircase. At the top, you'll find a group of Slimes guarding a rune. Defeat the Slimes to unlock the rune, then pick it up to proceed.

Related: How to use Mysterious Stone Slate in Genshin Impact

Climb the stairs upward to find yourself at an intersection. Ignore the stairs on the left and right, and instead, look ahead to find another purple portal. Enter the portal and wait for the environment to change. You'll find yourself inside a room with another rune. Pick it up—you should now have two runes circling around you. Then climb the stairs on the left and interact with the mechanism to open a gate in the sky.

Turn back and cross through the same purple portal to return to the previous area.

As soon as you're teleported back, climb the stairs on the right. You'll spot an Exquisite Chest in front of another purple portal. Loot the Chest, then enter the portal and wait for the environment to change. You'll be teleported to a room where another rune is immediately in front of you. Pick up the rune, so there should be three floating around you at this point.

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As soon as you pick up the third rune, the gate to its left will open. From there, glide downward and stand on the clearing circled in the image above. Wait for the three runes to embed onto the ground, forcing it to open.

Common Chest #3

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Glide or plunge down the massive vertical tunnel to trigger a cutscene and dialogue with the Fortune Lector. You need to defeat him in battle. His HP is easy to reduce, but he will eventually create a strong Cryo shield. You need to break it using an Element that can React with Cryo, such as Electro, Pyro, or Hydro.

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After defeating the Fortune Lector, dialogue with Eide will trigger. A door will slowly open up ahead. Enter the door and climb the stairs. Keep your eyes peeled as there's a Common Chest to the left of the top of the first staircase.

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After looting the Chest, keep going forward until you reach the end of the bridge. Interact with the mechanism to open the door. Inside, you'll be met with a chilling cutscene of Eide's conversion. Once that's done, you'll automatically be transported back to his home, where dialogue with a now coherent Caribert will continue.

This concludes A Lamenter at Fate's End, unlocking the Wonders of the World Achievement called The Far Side of Fate. You'll immediately unlock the final segment in this Archon Quest called Portended Fate.

Speaking of runes, check out our guide on How to solve the Apam Woods Luxurious Chest rune puzzle in Genshin Impact and How to solve the Luxurious Chest rune puzzle south of Mawtiyima Forest in Genshin Impact here on Pro Game Guides.


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Nicki Si
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.