To get Simple Keys in Hollow Knight: Silksong, there are four main methods and locations:
- Buy from Pebb in Bone Bottom for 500 Rosaries. This is one of the earliest and easiest sources but requires saving up a lot of Rosaries.
- Defeat the Roachkeeper enemy at the top of the tower in Sinner's Road. Defeating this boss drops a Simple Key.
- Purchase from Jubilana in Songclave (Choral Chambers) for 650 Rosaries. To unlock her store, you must complete The Wandering Merchant quest first.
- Loot a corpse sitting on the eastern bench in Sands of Karak. This Simple Key is found on a corpse on a bench in that area.
These four Simple Keys can be used to unlock locked doors in Bone Bottom, Deep Docks, Sinner's Road, and High Halls, granting shortcuts and access to valuable items like the Wanderer Crest, Flintslate, and rosary vaults.
