If you’ve picked up Areciel’s request as the Witch of Strength, the Sanctum of Renunciation can feel more like a labyrinth than a side‑quest. The good news is that the solution is less about brute‑force combat and more about liberating the ruins, grabbing two key parts, and slotting them back into the central device.
For a broader, official‑style context on how open‑world puzzle‑sanctums and exploration‑driven systems work in modern RPGs, you can refer to the Open world – Wikipedia page Open world – Wikipedia.
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The Sanctum of Renunciation sits on the banks of the Red River, roughly between the Sandpeak Gold Mine and the Giant’s Yard Outpost Camp, and you can reach it by heading northeast out of Drywinds Valley (northern Delesyia). When you first approach, the area will be swarming with Antumbra troops, so pause and clear them out before you try to interact with the central device in the main chamber. Once the sanctum is secure, you’re cleared to start solving the actual puzzle.

Where to get the Fusion Core and Fusion Reactor in Crimson Desert?
Inside the ruins, you’ll see metal‑barred walkways leading to the central chamber device. The puzzle boils down to two missing parts and a small “attach‑them” mini‑puzzle.
- Fusion Core: On the right side of the metal bars, near the entrance, there’s a small opening. Jump through it and look for a ledge to the upper right; the Fusion Core sits there, and you can use Axiom Force to pull it through the cracked wall and store it in your Kuku Pot.
- Fusion Reactor: On the left side, closer to the central‑chamber arch, you’ll find another gap in the bars. Climb through and check the far‑side wall ledge; the Fusion Reactor is there, and again you can grab it with Axiom Force and stash it in the pot.
Once both pieces are in your inventory, head to the central chamber and place them on the device. Attach the Fusion Reactor to the pylon on the left side of the arch, then climb up and use Jump plus Force Palm to slot it into place. The Fusion Core goes on a pedestal to the right of the main device; the exact angle doesn’t have to be perfect, since Force Palm will “snap” it into the correct position when you’re close enough.
Sanctum of Renunciation – quick reference table
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FAQ
Q: What is the core mechanic of the Sanctum of Renunciation puzzle?
A: The puzzle revolves around retrieving a Fusion Core and Fusion Reactor from side ledges, then attaching them to the central device in the main chamber using Axiom Force and Force Palm to cleanse the sanctum.
Q: Do I need to clear enemies before solving the Sanctum of Renunciation?
Yes; the sanctum is packed with Antumbra troops, and you should clear them out first so you can move freely around the bars and ledges without getting interrupted mid‑puzzle.