To craft The Cogwork Heart in Hollow Knight Silksong, a crucial item to awaken the Second Sentinel, you need the 3 Coghearts scattered across different areas of Pharloom. All of these are present in late-game areas, so make sure you have made enough progress.
Each cogheart location will have you solve a bell puzzle. All you have to do is follow the pattern of the bells to complete the puzzle. 3 coghearts mean three puzzles you must solve to get all pieces in Hollow Knight Silksong.
Where to Find All 3 Coghearts in Hollow Knight Silksong
When you get to the Cogheart’s location, you will come across a room filled with bells. Here, the game of memory begins. Memorize how the bells chime and then hit the bells accordingly to receive the Cogheart.
I highly suggest that before you try to get the Coghearts, collect the Faydown ability from Mount Fay, as it makes reaching some areas easy. Now, let’s get those Coghearts and figure out what they do.
Location #1: Choral Chambers
The first Cogheart can be found in the Choral Chambers. Make your way there and get close to the Citadel Spa on the west. Head to the upper, western part of Choral Chambers to enter a segment on the western wall. Now, just solve the puzzle, and you will get the Cogheart.
Choral Chambers Bell Puzzle Solution
Location #2: Whispering Vaults
To get the second Cogheart, you need to go to the Whispering Vaults. I suggest that you try to get here via Cogwork Core or Choral Chambers, as then it will be way easier. You will come across a lengthy central area. Drop down and enter the southwestern section to find the puzzle room.
Whispering Vaults Bell Puzzle Solution
Location #3: Memorium
To get the last Cogheart, you need to go to the Memorium. To get here, you can take two routes. First one is to take the Songclave exit, then go east and up to find the puzzle in the eastern room.
The second one is to take the Putrefield Ducts to exit into the Memorium. Make your way west, then go up and east, and you will come across some paths. Each one is the same and leads you to the puzzle room.
Memorium Bell Puzzle Solution
How to Use the Cogheart in Silksong
To awaken the Second Sentinel Automation at Cogwork Core, you need to complete the Cogheart and make it function again. Head over to the lower sections of Cogwork Core. See a passage below the bench on the western wall? Enter it and go through the opening to encounter the sleeping Automaton.
To attach the Coghearts, interact with the glass casing to break it. Inspect the robot and then attach the Cogheart. Congratulations! You have activated the Second Sentinel. He will fly away, for now. After some time, you will encounter it once again. Visit the Songclave wish board. Pick the Final Audience wish, requiring you to defeat the Second Sentinel.
After doing all that, you will get the Reserve Bind.
That’s all for this Hollow Knight: Silksong guide on how to get all 3 Cogheart and use them. I hope that you found this guide helpful.
