What to do in the Ruin Monastery in the Crimson Desert

You must defeat the three Antumbra bosses inside certain shrines to seal the Ruin Monastery in Crimson Desert. Traveling to the monastery before taking care of all the Antumbra will yield no results as there is nothing there except for a boss that only appears after the conditions are met. Here is what you can do in Cloister of Ruination and how to open the hidden boss in Crimson Desert.

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What to do in the Ruin Monastery in the Crimson Desert

cloister of ruination faction quest in the crimson desert Image via Game Rant; Source: Pearl Abyss

To unseal the Cloister of Ruination, you must complete four steps:

Defeat Antumbra Sword in Crimson Desert Image via Game Rant; Source: Pearl Abyss

After defeating one of the Antumbra bosses, you will gain knowledge of an enemy called Ator, Antumbra Archon. He is the sealed boss of the Ruination Monastery.

Each of the Antumbra bosses is located in a Sanctum belonging to a specific witch. You don't need to clear the Sanctums to continue with the Cloister of Ruination quest, as just defeating the boss is enough.

Keep in mind that these areas are filled with enemies and some will join the boss fight. Sanctums are scattered around Pywel and reaching some of them can prove difficult, so be prepared.

defeat the antumbra staff in the crimson desert Image via Game Rant; Source: Pearl Abyss

The Antumbra bosses are mostly manageable as long as you are prepared for the deadly attacks that can shoot you. Some have a gimmick that makes them easier to fight, like Antumbra's Staff's deadly attack which can be avoided by using Force Palm to stop him.

remove cloister of ruination seal in crimson desert Image via Game Rant; Source: Pearl Abyss

After defeating all 3 versions of Antumbra, you will continue with the Faction Quest and receive an update that you broke 3 of 3 seals to the subway in the Cloister of Ruination.

antumbra archon of the crimson desert Image via Game Rant; Source: Pearl Abyss

Go to the Monastery of Ruin and go to the deepest level to finally meet Ator, the Antumbra Archon.​​​​​​

Cloister Of Ruination Location In Crimson Desert

ruins monastery location in crimson desert Image via Game Rant; Source: Pearl Abyss

The Cloister of Ruination is located west of Pailune, near Silver Wolf Mountain. You can find it after entering the Wayward Woods.

Ruin Monastery near Abyss Scar in Crimson Desert Image via Game Rant; Source: Pearl Abyss

The monastery is quite far from most of the Abyss Nexus, so it may take some time to reach it. Fortunately, after visiting it for the first time, you can climb to the highest point next to the monastery to find an Abyss Cresset. This is used as a fast travel to get back quickly when the seal is broken.

go sow the monastery in the crimson desert Image via Game Rant; Source: Pearl Abyss

From the top, slide down through the tower to the lowest floor.

antumbra archon battle in the crimson desert Image via Game Rant; Source: Pearl Abyss

If you have done everything correctly, Ator will appear and the fight will begin. Enjoy the boss fight.


Crimson Desert Tag Page Cover Art


Released

March 19, 2026

ESRB

Mature 17+ / Blood, drug reference, intense violence, strong language

Developer

Pearl Abyss

Publisher

Pearl Abyss


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