The Sunken Cathedral's secrets revolve around three key elements: illusory walls that hide major shortcuts and items, intricate bell puzzles guarding weapon upgrades, and breakable floors concealing valuable collectibles. Mastering this drowned labyrinth means knowing where to strike walls, how to manipulate its sonic mechanisms, and the precise path to its most valuable loot, including The Pillager altarpiece and the final Veredicto upgrade.
This guide lays out the exact sequence to uncover every hidden passage, chest, and collectible in the Sunken Cathedral. We'll bypass the fluff and give you the direct routes to 100% this treacherous, waterlogged dungeon.
Are You Stuck? It's Probably This Illusory Wall
Let's cut to the chase. The single biggest roadblock in the Sunken Cathedral isn't a boss; it's a deviously hidden illusory wall connecting it to the Severed Tower. Many players get stuck in a large room with two locked doors on the left and a seemingly unreachable switch mechanism high on the right. You can't open these doors from this side.
The solution is not in the Cathedral itself. You must backtrack to the Severed Tower. In a large vertical room within the tower, there is a false wall. Strike it to reveal a hidden tunnel. This passage leads you directly to the other side of those locked doors, allowing you to unlock them and create a permanent shortcut that is essential for navigating the late game. If you've been running in circles, this is almost certainly the secret you're missing.
The Path to Every Hidden Item & Upgrade
Once you have the critical shortcut unlocked, you can systematically loot the Cathedral. The area is dense with secrets, many tied to bell-ringing mechanics and breakable architecture. Follow this path from the area's first Prie Dieu to ensure you miss nothing.
From the First Shrine: The Bell Puzzle and Veredicto Upgrade
Your first objective is the final upgrade for the Veredicto war censer. From the first Prie Dieu shrine (S1), head left. In a large vertical room, climb up the right-side platforms. Ascend through the exit above, then head right twice.
In this new room, climb to the upper left section to find a statue mechanism. Activate it. This allows you to push the large, suspended bell all the way to the right. Once it's in position, strike the bell to ring it. This will unseal a previously locked door below you to the right. Drop down and pass through it to claim your Veredicto Upgrade, completing the weapon.
Blasphemous 2 in-game screenshot
After securing the upgrade, exit and drop down. To the right, you can break a glass mechanism to lower a ladder, creating a convenient shortcut back to the first shrine. Don't miss Cherub #20 floating to the left in this same room before you proceed.
The Whispering Wall & The Pillager's Altarpiece
Some of the Cathedral's best loot is hidden behind walls that don't just disappear—they shatter. In a room deep within the Cathedral's western side, you'll find a path that seemingly dead-ends at a left wall. Strike this wall to break it open, revealing a new room.
Before entering the newly revealed room, slide under the wall to the right to find an altar with a hefty sum of 3,500 Tears. Now, enter the room to the left. To get the chest here, you must first defeat the enemies to unlock the mechanisms. Activate the statue on the center-left platform, then drop down and ring the bell on the bottom right. This will create a path of platforms leading up to a chest containing The Pillager altarpiece.
There is another, more straightforward illusory wall in the Cathedral. In the room just before the shortcut back to the first shrine (S1), strike the wall in the top-left corner. It will vanish, revealing a passage. Drop down and use a ground slam to break through several weak floors, at the bottom of which you'll find an altar with a valuable Mark of Martyrdom.
Blasphemous 2 in-game screenshot
Sunken Treasures: Rosary Bead and Regula's Quest
The lower levels of the Cathedral hold more secrets for those who explore thoroughly. From the main path, you'll eventually descend into a waterlogged chamber. Drop down to the central platform and take the stairs on the right. Here you'll find a chest containing the Salt-Covered Spear Point Rosary Bead.
Nearby, you will also encounter an NPC named Regula, who is holding up a collapsing archway. She asks you to find another way into the sanctuary behind her. This requires a loop through a large, maze-like square room. In this maze, you can find Cherub #21 in the top-right corner and a Forgotten Tribute near the center. By navigating the maze and breaking another wall, you can enter the sanctuary from the other side, finding the arch completely collapsed. Return to Regula's location; she will be gone, leaving behind Regula's Cloth. Take this item back to the sanctuary and interact with the statue to receive the Remembrance of Regula altarpiece.
Blasphemous 2 in-game screenshot
The Hidden Symbol at the Cathedral's Doorstep
There is one final, crucial secret associated with this location, though it's technically in the preceding area, the Sea of Ink. To find it, you must first have the Chime of the Twisted One prayer, which reveals hidden symbols throughout the world.
Travel to the room that serves as the direct entrance to the Sunken Cathedral. In the background, you'll see a long row of large, seated statues. Approach the second statue from the right, just before the stairs leading into the Cathedral proper. Stand before it and use the Chime of the Twisted One. A glowing symbol will appear in the statue's hands. Collecting all ten of these symbols unlocks the "Still Among Us" achievement and grants significant rewards.
FAQ: Your Sunken Cathedral Questions Answered
How do I open the bell-locked door for the Veredicto upgrade?
You must first activate a statue on a platform above and to the left of the bell. This allows you to push the bell all the way to the right. Ring it in this new position to open the door.
Where is the secret shortcut to the Severed Tower? The secret is an illusory wall inside the Severed Tower, not the Cathedral. Find the large vertical room in the tower and strike the walls until you find the one that breaks, revealing a hidden passage that connects back to the Cathedral's locked doors.
I found Regula, but how do I get behind her? You must navigate a large, square-shaped maze room nearby. An exit in the center-right of this maze leads to a breakable wall. Beyond that is the other side of the sanctuary. This progresses her quest.
What's the reward for defeating Odon, the area boss? Defeating Odon of the Confraternity of Salt rewards you with 3 Marks of Martyrdom and the Key of Salt. It also opens the path downward into the next area, the Labyrinth of Tides.
Final Word
The Sunken Cathedral is a turning point in Blasphemous 2, where the game's environmental puzzles become significantly more complex. Its secrets are designed to test your observation and willingness to strike every suspicious wall. By following this guide, you've stripped its mysteries bare, claiming its powerful upgrades and valuable treasures. The path forward is clear, Penitent One.