Hollow Knight Silksong: All Cogheart Locations and How to Use Them

In Hollow Knight: Silksong, the three Cogheart pieces are one of Pharloom’s best-kept secrets. As of 2026, this little scavenger hunt still hasn’t changed in the latest build, so players can follow these steps without worry. The game barely drops a hint about what they do, so plenty of players end up running around like a headless chicken trying to figure out if the pieces are even worth the trouble. For completionists, though, these gears are the real deal—they unlock a secret side quest and a special boss encounter. This guide breaks down every Cogheart piece location and how to use them, no fluff, just the good stuff.

Cogheart Piece Location #1: Choral Chambers

The first Cogheart piece sits on the west side of the Choral Chambers. Once players reach the spot shown below, they will bump into a bell puzzle where the bells have to be rung in a specific order. Missing a note means backtracking, so it is smart to pause and check the pattern before going ham on the bells.

Using a number label for each bell, the correct sequences are:

• Sequence 1: 1, 5, 4, 6

• Sequence 2: 3, 6, 5, 1, 7

• Sequence 3: 2, 4, 6, 3, 5, 1

After completing the bell puzzle, the first Cogheart piece is in the bag. Then it is time to head toward the Whispering Vaults.

Cogheart Piece Location #2: Whispering Vaults

The second piece lurks in the southwestern part of the Whispering Vaults. This area serves up another bell puzzle, and the pattern here is a little more twisty than the first one.

The solution to the Whispering Vaults bell puzzle is:

• Sequence 1: 1, 2, 7, 4

• Sequence 2: 7, 5, 6, 4, 5

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