There are four Simple Keys in Hollow Knight: Silksong, and they can be obtained from the following locations:
- Bone Bottom - Purchased from Pebb, an NPC vendor, for 500 Rosaries.
- Sinner's Road - Dropped by a Roachkeeper enemy at the top of a tower in Sinner's Road.
- Sands of Karak - Found on a corpse sitting on a bench in the Sands of Karak area.
- Songclave (Choral Chambers) - Purchased from Jubilana, a vendor who appears after completing The Wandering Merchant quest, for 650 Rosaries.
These Simple Keys are used to unlock various locked doors scattered around the map, opening new areas and allowing access to rare items.
