The **Exhaust Organ**—a labyrinth of vents accessed after navigating the Mists—holds a crucial checkpoint in Act 2 of Hollow Knight: Silksong. This guide covers:
- Escaping the Mists to reach the area
- Locating the essential bench
- Overcoming environmental hazards
- Defeating the Phantom boss
Navigating to the Exhaust Organ
Reaching this area involves solving the Mists’ looping puzzle:
- Use your Needlevin on glowing butterflies to reveal path directions
- Follow the butterflies’ flight trajectories through multiple chambers
- Complete checkpoint sections until reaching the BileWater’s Exhaust Organ entrance
Securing the Exhaust Organ Bench
Upon entering the organ:
- Move left and perform a double jump to access an upper platform
- Activate the bench—your primary safe zone in this volatile area
Why it matters: The subsequent vents feature deadly air currents, making this checkpoint vital for avoiding repetitive backtracking.
Discovering the Flea Shortcut
- Progress through the vents beyond the bench
- Look left for a platform housing a trapped Flea NPC
- Freeing them unlocks:
- A narrative thread for your caravan
- A convenient return path through the organ
Confronting the Phantom Boss
This agile warrior wields a needle for both offense and movement. Combat essentials:
- Parry Stance: Avoid attacking when she assumes defensive posture to prevent counterattacks
- Phase 2: Watch for aerial slams—keep mobile and strike during recovery frames
- Reward: Victory breaks the Mists’ curse, grants new abilities, and opens Act 2 progression
Key Questions Answered
Where is the Exhaust Organ bench located?
Left-side upper platform accessible via double jump after entering the area.
What’s the method to escape the Mists?
Butterfly-guided navigation using the Needlevin tool across sequential chambers.
Which boss guards this area?
Phantom—a parry-focused duelist with aerial slam attacks in later phases.
Is the bench mandatory?
Absolutely—it prevents significant progress loss during vent exploration and the Phantom encounter.