Simple keys in Hollow Knight: Silksong are used to open doors scattered around Pharloom, but they're few and far between. As you're exploring Silksong, you've probably come across a few locked doors.

The Simple Key is an item that existed in Hollow Knight as well, and its purpose was to open the various heavy gates inside Hallownest. Team Cherry reintroduces the item into their new game, Hollow ...