TL;DR
- The Key of Apostate unlocks two final doors in The Slab after obtaining other keys
- Located in Putrefied Ducts’ lower-left section, accessible via Memorium or Bilewater
- Putrefied Ducts features dangerous carnivorous vines and the Huntress NPC
- Bottom door leads to First Sinner boss fight for Rune Rage ability
- Top-right door contains challenging platforming section with Mask Shard reward
Discover how to expand your exploration capabilities in The Slab by securing the elusive Key of Apostate in Hollow Knight: Silksong. This essential item grants access to previously inaccessible areas containing valuable upgrades and challenging encounters.
The Slab represents a crucial region within Pharloom that adventurers should prioritize visiting, particularly for acquiring the vital Faydown Cloak double jump ability that dramatically enhances mobility. During your journey through this area, you’ll naturally collect other important keys such as the Key of Indolent and Key of Heretic. However, observant explorers will quickly notice several stubbornly locked doors that specifically demand the Key of Apostate to open.
Pro Tip: Before venturing for the Key of Apostate, ensure you’ve obtained the double jump ability from The Slab, as it significantly eases navigation through Putrefied Ducts’ treacherous terrain.
The Hollow Knight: Silksong Key of Apostate awaits discovery within the Putrefied Ducts region, positioned strategically in the world map’s upper-right quadrant. Reaching this remote location requires careful planning and execution.
- Access Putrefied Ducts by either taking the southeastern exit route from Memorium or the northernmost passage emerging from Bilewater. Both paths present distinct challenges and require different navigation approaches.
- Putrefied Ducts presents numerous environmental threats, most notably aggressive carnivorous vines that actively grab and attempt to consume Hornet. Upon arriving in this hazardous zone, navigate toward the southwestern sector where you’ll encounter the Huntress character involved with the Broodfeast quest storyline.
- The Key of Apostate rests concealed within a compact alcove situated at the northwestern corner of the main chamber, requiring precise platforming to reach safely.
Navigating Putrefied Ducts’ perilous environment demands careful movement and strategic positioning to avoid its deadly flora.
Common Mistake: Many players underestimate the vine hazards in Putrefied Ducts. These plants have deceptive reach and can quickly end your exploration if approached carelessly. Maintain constant awareness of your surroundings and utilize aerial attacks to clear paths when necessary.
After successfully obtaining the Hollow Knight: Silksong Key of Apostate, carefully retrace your path back to The Slab region. You’ll now possess the capability to unlock the two remaining secured doorways that previously blocked your progress.
- The doorway positioned at the shaft’s lowest point—conveniently located nearest to the resting bench and rapid travel location—grants entry to an ominous chamber featuring a confinement cell secured by multiple binding chains. Shattering these restraints initiates combat against the formidable First Sinner boss. Emerging victorious from this encounter rewards you with the powerful Rune Rage silk technique.
- The entrance at the shaft’s northeastern section presents a particularly demanding jumping and traversal sequence. Your objective involves precisely pogo jumping on rotating bladed mechanisms to ascend safely. Reaching the summit reveals a precious Mask Shard health enhancement that permanently increases your maximum vitality.
The First Sinner boss confrontation (left) and the demanding platforming trial for the Mask Shard (right) will thoroughly challenge your combat and movement skills.
Time Investment: Allocate approximately 15-20 minutes for the round trip to Putrefied Ducts, plus an additional 10-15 minutes for the boss fight and platforming challenge. The entire sequence typically requires 25-35 minutes depending on player skill level and familiarity with the game’s mechanics.
Action Checklist
- Acquire Faydown Cloak double jump ability in The Slab
- Navigate to Putrefied Ducts via Memorium or Bilewater routes
- Carefully traverse hazardous vines in lower-left section
- Retrieve Key of Apostate from upper-left chamber nook
- Return to The Slab and unlock both remaining doors
- Defeat First Sinner boss for Rune Rage ability
- Complete platforming challenge for Mask Shard health upgrade
No reproduction without permission:SeeYouSoon Game Club » Where To Find The Key Of Apostate In Hollow Knight: Silksong Complete guide to finding the Key of Apostate in Hollow Knight: Silksong and unlocking The Slab's hidden chambers
