
In the enchanting world of Hollow Knight: Silksong, players will encounter three unique Cogheart pieces scattered across the map. While the game offers limited guidance on their significance, successfully locating all three pieces unlocks a thrilling side quest that culminates in a secret boss battle.
If you’re aiming for 100% completion in this expansive adventure, hunting down these Cogheart pieces is essential. Rather than wandering aimlessly, this comprehensive guide will direct you to each Cogheart piece’s location and explain their purpose in the game.
Location #1: Choral Chambers

Your quest begins in the west side of the Choral Chambers. Upon reaching the designated area, you’ll need to tackle a bell puzzle where you’ll strike the bells in a specific order. The sequence for solving this initial puzzle is as follows:
- Sequence 1: 1, 5, 4, 6
- Sequence 2: 3, 6, 5, 1, 7
- Sequence 3: 2, 4, 6, 3, 5, 1
Completing the bell puzzle rewards you with the first Cogheart piece. With this in hand, set your sights on the next location: the Whispering Vaults.
Location #2: Whispering Vaults

Your next destination is the Whispering Vaults, specifically the southwestern area shown in the accompanying image. Like the previous location, you’ll be faced with a bell puzzle to unlock the next Cogheart piece. Here’s how to solve it:
- Sequence 1: 1, 2, 7, 4
- Sequence 2: 7, 5, 6, 4, 5
- Sequence 3: 2, 7, 3, 5, 6, 1
Once the final bell rings, a platform will rise, granting you the second Cogheart piece.
Location #3: Memorium

The final Cogheart piece is located on the eastern side of Memorium, which becomes accessible after acquiring the double jump ability. Upon reaching Memorium, you’ll encounter yet another bell puzzle. Solve it with the following sequences:
- Sequence 1: 6, 5, 4, 3
- Sequence 2: 4, 5, 2, 4, 1
- Sequence 3: 2, 7, 3, 5, 6, 1
Upon completing this puzzle, a platform will rise once more, granting you the last Cogheart piece in Hollow Knight: Silksong.
Utilizing the Cogheart Pieces

Having collected all three Cogheart pieces, the next step is to activate the Second Sentinel located in the Cogwork Core. For your convenience, the location is marked in the image below.

Insert the Cogheart pieces at the Sentinel to liberate it. Afterward, return to the Choral Chambers, where you’ll find the Second Sentinel engaged in combat against enemies. Its appearance can be random, so be prepared to explore thoroughly until you find it.
Witnessing the Second Sentinel in battle twice is essential to unlock the Final Audience quest on the Wish Board in Songclave. This final quest leads to an epic confrontation, requiring you to track down and defeat the Second Sentinel.
Complete this challenging task to reap the rewards of your explorations and fully immerse yourself in the thrilling journey that Hollow Knight: Silksong has to offer.
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