Hey gamers! Looking to snag the Apostate Key in Hollow Knight: Silksong? You’re in for a challenge, but once you know what to do, you’ll be diving into those twisted depths in no time! If you haven’t been kidnapped by The Slab yet, you’ll first meet this locked door when you venture left from the Choral Chambers in Act 2.
This key unlocks a whole bunch of secrets, so here’s the lowdown on where to find it and how to access those hidden areas.
Finding the Apostate Key

To score the Apostate Key, you’ll need to get to the Putrified Ducts. First things first: unlock the Faydown Cloak double jump by scaling Mount Fay, then enter the Memorium from the top level of the Choral Chambers. Here’s your step-by-step guide:
- Make your way to Songclave and find the first shrine. Start moving toward the Cogwork Dancers boss.
- You’ll spot a point where you can leap into the Memorium.
- Head to the far right side of the area, cross a bridge (watch out for bats!), and you’ll find merchant Jubilana during The Lost Merchant quest.
- Jump up at the end of the bridge to find the entrance to the Putrified Ducts.
If you’re feeling brave, you can also defeat Groal the Great at the top of Bilewater and use the shortcut he opens up to reach the Ducts.

Once you’re inside the Putrified Ducts, navigate down to the main shaft, all the way to the bottom, then head left. You’ll need to jump back up into a dark tunnel (beware of a giant enemy lurking around!). At the end of this tunnel, you’ll find the Apostate Key in a smashable cage. Time to head back to The Slab and unlock that door!
Tips and Tricks
- Use your double jump frequently: Mastering the Faydown Cloak will help you reach tricky spots.
- Watch your environment: Enemies often drop useful items, so be attentive to the landscape—especially where bats are swarming.
- Explore every nook: You never know what hidden items or secret passageways you might find!
- Save often: Make use of shrines to save your progress, especially before tackling tough bosses like Groal.
- Join online communities: Engage with fellow players on forums or social media for tips and strategies.
So grab your weapon and get out there! Those dark secrets are waiting just for you. Happy gaming!