What to know

  • Simple Keys unlock special doors in three known locations: Bone Bottom, Deep Docks, and Sinner’s Road.
  • The Bone Bottom door leads to the Wormways and grants early access to the Wanderer’s Crest.
  • The Deep Docks door leads to Flintslate, a tool that adds flame damage to your Needle.
  • The Sinner’s Road door starts the Green Prince questline — reaching it requires completing a platforming challenge to get the key.

In Hollow Knight: Silksong, Simple Keys are valuable one-use items that open hidden or locked doors, and they're worth tracking down—they help unlock secrets, tools, and side quests that enrich your journey through Pharloom.

Related: Silksong Simple Key Guide: Location, Rewards, and More

Silksong Doors Location: Where to use the Simple Keys

Here is the location of all the three doors in Silksong where you can use your simple keys.

Door #1: Bone Bottom door — shortcut to Wormways and Chapel of the Wanderer

Using the Simple Key on the locked door above Bone Bottom opens a shortcut through the Wormways, leading to the Chapel of the Wanderer. This shortcut allows you to access the Wanderer's Crest faster. You’ll need the Swift Step dash ability to reach this door via cages and gaps above Bone Bottom.

How to reach it the Bone Bottom door
  1. Take the elevator from Mosshome to Bone Bottom.
  2. Head up and left, then use cages to cross gaps with Swift Step.
  3. Avoid flies, continue left past a mole, and you’ll find the locked door on the far left of the next screen.

Door #2: Deep Docks door — unlock Flintslate tool

Another locked door lies in the Deep Docks, past the Forge Daughter's bench. Unlocking it reveals a shortcut leading to Far Fields and rewards you with Flintslate, a tool that lets your Needle deal fire damage. You’ll need to navigate switch platforms and dash across lava-filled areas to reach it.

Door #3: Sinner’s Road door — starts Green Prince quest

Using a Simple Key on a door in Sinner’s Road frees the Green Prince and begins his questline. The key to access this door is found nearby, but you’ll need to clear a tough platforming challenge first.

Silksong simple doors summary

Simple Key Source Location What it Unlocks Requirements
Buy from Pebb Bone Bottom Wormways shortcut → Wanderer's Crest 500 Rosaries, Swift Step
Found in Sinner’s Road Sinner’s Road Green Prince questline Platforming challenge
Unlock in Deep Docks Deep Docks Flintslate tool → Fire damage Needle Reached via Deep Docks area
Tips
  • Since the purchased key is single-use, choose carefully: shortcuts, tools, or quest content.
  • If you prefer progression speed, Bone Bottom is best. For combat power, Deep Docks is stronger. For lore and side quests, Sinner’s Road is essential.

Deciding if a Simple doors are worth it

If you're looking for quick access to combat upgrades, the Bone Bottom door is the best first target—it opens Wormways and leads to the Wanderer’s Crest. For longer-term power, Deep Docks offers immediate combat utility via the Flintslate tool. If you're into side quests and lore, head to Sinner’s Road and rescue the Green Prince once you're comfortable with platforming challenges.