Step 1: Activate the Nexus Forge
Before you can begin cleansing Caltheris's Sanctuary, you must first repair the Nexus Forge using the Void Talon.
Once the Forge is repaired, interact with the outer, middle, and inner cranks surrounding Pack-a-Punch. Your goal is to rotate them until they align toward Caltheris's Sanctuary, causing a laser beam to fire into Caltheris's mouth.
Because the crank puzzle can be difficult to solve manually, a puzzle solver can make the process considerably easier. Pay attention to each crank's location and rotation direction before making adjustments.
Key takeaway: Repair the Nexus Forge first, then correctly align all three cranks with Caltheris.
Step 2: Find the Shimmering Thread
Next, you need to acquire three Shimmering Threads.
These items can randomly appear from purple orbs floating around the map. Use the Void Claw to pull a purple orb down to the ground, then interact with it. Because the thread does not spawn every time, you may need to search multiple orbs.
Once you obtain the Shimmering Thread, take it to the brazier inside Caltheris's Main Chamber.
You also need an Astral Flame. Pull a purple orb toward Pack-a-Punch and use the cranks to obtain the purple flame.
Place the Shimmering Thread into the brazier and ignite it with the Astral Flame. A zombie will then become infected with mist.
Travel to Caltheris's Passage and use the Titan Trap to kill the infected zombie. If performed correctly, Caltheris will respond with a special voice line.
Key takeaway: Purple orbs are essential for obtaining both the Shimmering Thread and Astral Flame.
Step 3: Solve the Caltheris Laser Dial Puzzle
Enter Caltheris's Main Chamber and look toward the brazier. You should find a stone tablet on the ground.
Interact with the tablet and stand on it. While standing there, hold the aim button to ADS. After enough time, a hidden dial will appear.
You then need to fire a charged Warden's Blight shot at the dial.
The objective is to position the laser so it focuses on the northeast wall, immediately to the right of the blue crystal.
Use the middle ring of the dial for precise adjustments. The outer ring moves the laser too far, making it much harder to achieve the correct position.
Key takeaway: Carefully adjust the middle ring until the laser hits the northeast wall beside the blue crystal.
Step 4: Defeat the Shadow Souls
Once the laser is positioned correctly, zombies will begin spawning beneath the dial.
Kill the zombies in this area while the laser remains focused on the wall. Eventually, the laser will destroy the wall and reveal a stone statue.
Shoot the statue to release four Shadow Souls.
You can eliminate them with any weapon, but Light Mend and Warden's Blight are particularly effective.
After all four Shadow Souls are defeated, destroy the stone statue. This ends the lockdown and allows you to proceed.
Key takeaway: Destroy the statue only after dealing with all four Shadow Souls.
Step 5: Prepare Caltheris for Cleansing
Now take the Void Claw and pull a purple orb toward the stairs at Caltheris's Passage.
Once the orb is positioned correctly, charge your Warden's Blight and shoot the orb upward into Caltheris's head.
If successful, her head will begin glowing purple.
This means the temple is ready for the final cleansing sequence.
Key takeaway: A purple-glowing Caltheris signals that you're ready for the final step.
Step 6: Make It Rain and Cleanse the Temple
The final stage requires rain.
Return to Veytharion's Sanctuary and interact with the blue well that you unlocked through the earlier block puzzle.
The rain will begin during the next round.
Once the rain starts, return to Caltheris's Sanctuary. Use the Astral Flame and shoot Caltheris directly in the forehead.
Lightning will strike the temple, completing the cleansing process.
Key takeaway: Activate the blue well before the round changes, then use the Astral Flame on Caltheris's forehead once the rain begins.
Helpful Tips for Caltheris's Sanctuary
·Prepare before starting: Bring plenty of ammunition and armor.
·Keep the Void Claw ready: It is required for several stages.
·Use Warden's Blight carefully: Charged shots are important for both the dial and purple orb.
·Clear zombies before solving puzzles: Avoid getting interrupted during precise interactions.
·Remember the weather requirement: Rain only begins during the following round.
·Don't skip the Veytharion puzzle: The blue well is required for the cleansing finale.
Final Verdict: Cleanse Caltheris and Continue the Easter Egg
Caltheris's Sanctuary may initially seem overwhelming because several separate objectives are chained together. However, the process becomes manageable when you follow the correct order: repair the Nexus Forge, acquire the Shimmering Thread, solve the laser puzzle, defeat the Shadow Souls, charge Caltheris with a purple orb, trigger rain through Veytharion, and finally strike her forehead with the Astral Flame.
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