Hollow Knight: Silksong has plenty of mysterious items, but few feel as important as the Cogheart. Whether you’re stuck wondering where to take the Cogheart Silksong or hunting for every last piece, this guide covers everything you need to know.
From early-game discovery to late-game delivery, here’s the most practical breakdown of the Cogheart quest in Silksong.
What Is the Cogheart in Silksong?
The Cogheart is a multi-part mechanical relic tied to one of Silksong’s key progression systems. It’s not just a simple collectible — it’s a story-important item that bridges exploration, puzzle-solving, and character arcs in the kingdom of Pharloom.
Players often ask what to do with Cogheart Silksong because the game doesn’t immediately tell you its purpose. Collecting all pieces gradually reveals its true function: restoring power to an ancient mechanism that opens new paths and affects the game’s ending branches.
How to Get the Cogheart in Silksong
The Cogheart quest becomes available in Act 1 after you escape the initial prison area and reach the Threadweave Crossroads.
Speak with the injured tinkerer NPC Mender Cogwyn near the broken elevator. He mentions a “heart of gears” scattered across Pharloom after a catastrophic event. This conversation officially starts the Cogheart quest.
From here, the item splits into five pieces scattered across different regions and acts.
All Cogheart Silksong Locations
Here’s every known piece with clear directions:
Piece 1 – Act 1 (Threadweave Crossroads)
Found in a hidden room behind a breakable wall in the upper western section. You’ll need the Silk Lash ability to reach the ledge. Look for the faint gear symbol carved into the stone.
Piece 2 – Act 2 (The Cogworks)
Deep inside the industrial zone known as the Cogworks. This area opens after defeating the mid-game boss Gearwarden Vell. The piece is inside a timed platforming puzzle involving spinning cogs and silk zip-lines.
Piece 3 – Act 2 (Deep Lumen Hollow)
Located in the flooded lower section of Deep Lumen Hollow. You’ll need the Breathing Bell tool to stay underwater longer. The piece sits at the bottom of a vertical shaft guarded by aggressive silk eels.
Piece 4 – Act 3 (Crown of Pharloom)
High up in the royal district. After unlocking the Skyward Pass, backtrack to the collapsed tower and use the Needle Dive ability to descend through a narrow shaft. The piece hides behind a secret door.
Piece 5 – Act 3 (The Hollow Core)
The final piece appears right before the late-game section. It’s part of a larger environmental puzzle involving rotating mechanical hearts. Solving the puzzle also gives you a permanent movement upgrade.
Where to Take the Cogheart Silksong
Once you have all five pieces, return to Mender Cogwyn at his workshop in the Threadweave Crossroads.
Giving him the complete Cogheart triggers a beautiful cutscene and unlocks the Restored Cogheart, which serves as both a key item and a powerful charm-like tool.
You can then place the Cogheart in three different locations:
- Main Path – Insert it into the Great Mechanism in the Crown of Pharloom to open the final act.
- Secret Path – Use it in the abandoned laboratory in the Cogworks for an alternate boss encounter.
- Side Quest – Bring it to the grieving widow in Bonebottom for a heartfelt story and mask shard reward.
Cogheart Puzzle Solution
The central puzzle in the Hollow Core frustrates many players. Here’s the quick solution:
- Align three rotating rings so glowing symbols match the wall carving pattern
- Use silk to tether loose cogs in place
- Strike the central heart with a charged Needle attack when symbols align
Completing this grants the Heartbeat Resonance ability.
Cogheart Quest Rewards
- Permanent movement upgrade (increased air dash distance)
- Unique charm: Cogheart Core (reduces tool cooldown by 25%)
- Access to secret areas and one alternate ending path
- 450 Essence
Quick Tips for Finding Every Piece
- The game plays a soft ticking sound when you’re near piece locations
- Some pieces only appear after acquiring specific movement tools
- Check every elevator shaft and collapsed ceiling for hidden pieces
- In Steel Soul mode, Cogheart pieces stay with you even after death
Wrapping Up
The Cogheart quest rewards curious players without being mandatory. Completing it gives you a richer understanding of Pharloom’s history and some useful upgrades along the way.
Now you know exactly where to use Cogheart Silksong and how to find every piece. Good luck out there!