Embarking on the quest for the Apostate Key in Hollow Knight: Silksong can be a significant challenge for any adventurer. This essential key is required to unlock much of The Slab’s formidable prison region, an area typically encountered early in Act 2 when heading left from the Choral Chambers. Without it, many of Pharloom’s dark secrets remain inaccessible.
Fortunately, TechTalesLeo and the team at Digital Tech Explorer are here to illuminate your path. This comprehensive guide will detail the exact location of the Apostate Key in Silksong and outline the steps to retrieve it, ensuring you can fully explore this mysterious prison area.
Where to find the Apostate Key in Silksong
You can find the Apostate Key in the Putrified Ducts region. To get here, you’ll first need to unlock the Faydown Cloak double jump by climbing Mount Fay, and then enter the Memorium area on the top level of the Choral Chambers. Here’s a quick rundown:
- Head to Songclave and the first shrine, then go along the route to the Cogwork Dancers boss.
- Along the way, you’ll find a point where you can jump up into Memorium.
- From here, you’ll want to go to the far right of the area, where you can get outside and cross the top of a bridge where a load of bats will attack you (Incidentally, this is also where you find the merchant Jubilana in The Lost Merchant quest).
- Jump up at the far end and you’ll find the entrance to the Putrified Ducts.
You could also take an entirely different route by defeating Groal the Great at the top of Bilewater and opening the shortcut above him.
Once in the ducts, you’ll want to navigate to the point above, finding the main shaft, going all the way down to the bottom, going left, and then hopping up into the dark tunnel going left again—watch out for the giant enemy here. At the far end of the corridor, you’ll find the Apostate Key in a smashable cage.
Now you just need to head back to The Slab, where you can open the door.