There are four Simple Keys in Hollow Knight: Silksong, each found in a distinct location, and they are used to unlock specific locked doors on the map that lead to shortcuts and valuable rewards.
Simple Key Locations
- Bone Bottom - Buy a Simple Key from Pebb for 500 Rosaries.
- Sinner's Road - Defeat the Roachkeeper boss at the top of the tower to get a Simple Key.
- Sands of Karak - Loot a corpse sitting on the eastern bench to find a Simple Key.
- Songclave (Choral Chambers) - After completing the Wandering Merchant quest, buy a Simple Key from Jubilana for 650 Rosaries.
Where to Use Simple Keys
- Bone Bottom - Unlocks a shortcut door in the Wormways leading to the Chapel of the Wanderer.
- Deep Docks - Opens a door under the Forge Daughter's store for a shortcut to Far Fields and to access Flintslate.
- Sinner's Road - Unlocks the door imprisoning the Green Prince to start his questline.
- High Halls - Opens a door leading to a rosary vault with multiple rosary chests and a Pale Rosary Necklace.
These keys unlock important shortcuts and valuable items, making them important to gather throughout the game.