The Cogwork Heart is a crucial key item used to awaken the Second Sentinel. You’ll have to find 3 Cogheart Pieces to create this item, which are all scattered in different areas of Pharloom. This guide will help players find all Cogheart Pieces to make the Cogwork Heart for the Second Sentinel in Hollow Knight: Silksong.
All Cogheart Piece Locations
The 3 Cogheart pieces can be obtained in the Puzzle Rooms in Choral Chambers, Whispering Vaults, and Memorium. Each room contains memory games, wherein you simulate a Simon Says puzzle by ringing the bells in sequence. Here is how you can find all Cogheart Pieces.
⚙️Note: You might have to break the case containing the Second Sentinel if you cannot find the puzzle rooms.
- Choral Chambers Puzzle Room: The puzzle room is in the secret area on the vertical passage along the corridor that connects the Choral Chambers to The Slab. Head up and hug the left side of the wall until you reach the opening near the top.
- Whispering Vaults Puzzle Room: From the Bench near the Songclave area, go left to the vertical drop and hug the left side of this enormous gap. Near the bottom of this passage, there should be a small opening that will lead you to the Puzzle Room.
- Memorium Puzzle Room: Go to the significant vertical passage near the top of Memorium and hug the right side of the wall. On the level after the one with the Bench, head to the right.
Once you’ve obtained all 3 Cogheart pieces, they will automatically transform into the Cogwork Heart. You can now use this item to activate the Second Sentinel in Cogworks Core. You can free the Automaton in the area on the left side of the Bench before the corridors leading to the Choral Chambers.
⚙️Note: Make sure to buy the Map for this area from the Merchant to ensure that you can accurately navigate through the region.
The Second Sentinel Fights Enemies
Once you’ve inserted the Cogwork Heart into the Second Sentinel, it will activate and say a few lines. Afterward, it will disappear from the chamber, and you can find it randomly attacking enemies.
