The **Exhaust Organ** stands out as one of Hollow Knight Silksong’s most unique areas—a labyrinth of steam vents and oppressive hazards. Reaching it demands mastery of the Mist’s disorienting paths and culminates in a climactic boss battle that unlocks powerful abilities.
Navigating to the Exhaust Organ
- Prerequisite: Progress through Shellwood to defeat Widow in Bellhart, earning the Needolin Ancestral Art.
- Through the Mist: Follow glowing bugs’ flight paths after using Needolin to play musical notes. This reveals exits in the fog.
- Exit the Mist to enter the Exhaust Organ’s vertical chambers.
Conquering the Exhaust Organ
The area challenges players with steam vents that erupt unpredictably. Key strategies:
- Time wall jumps and glides carefully to ascend.
- At the peak, face Phantom, a swift boss focused on parries and counterattacks.
Phantom Boss Tactics
- Strike 1-2 times, then retreat to avoid retaliation.
- Heal during openings: When Phantom throws its needle, use the recovery time to restore health.
Key Rewards
- Cross Stitch Skill: Earned after defeating Phantom, this ability lets Hornet parry and counter enemies.
- Fast Travel: Activate switches to connect the Exhaust Organ to Grand Bellway (note: Citadel routes cost more Rosaries).
Freeing the Hidden Flea
- Near the shortcut switch, strike the top-left wall to reveal a hidden path.
- Follow external platforms leftward to reach the Flea’s cage, advancing its questline.
FAQ
How to navigate the Mist?
Use Needolin near glowing bugs—their flight path marks the correct route.
Phantom’s primary reward?
The Cross Stitch Silk Skill, enabling parry-counter combos.
Locating the Flea?
Break a hidden wall near the top-left shortcut and traverse exterior platforms.