Opens simple locks, but due to its shoddy construction, it can only be used once. There are four locations that can be opened using Simple Keys:
- The entrance to Royal Waterways from City of Tears.
- The cave to the right of Dirtmouth, beyond the graveyard. This cave is home to Confessor Jiji, who, in return for a Rancid Egg, can summon the Knight's Shade, which is useful if the Shade is stuck in a hard-to-access area and holding a lot of Geo. In Steel Soul Mode, the cave is instead home to Steel Soul Jinn, who trades Rancid Eggs from the Knight for Geo.
- The Pleasure House in City of Tears, along with a Hot Spring, Poggy Thorax, and Songstress Marissa. It is also Millibelle's refuge after she scams the Knight. Once inside, a shortcut can be opened from the Hot Spring to a lift shaft that leads from City of Tears to Resting Grounds, and also grants easy access to the northern part of Kingdom's Edge and the Colosseum of Fools.
- The cocoon of the Godseeker in the Junk Pit. Using the Dream Nail on her grants access to Godhome.
How to Acquire
- One can be bought from Sly in Dirtmouth for 950.
- One can be found in City of Tears, in the big room with Winged Sentries and a Whispering Root just below the City Storerooms. The key is located in the topmost alcove on the right of the room.
- One can be found in Ancient Basin, on the dead body of a Royal Retainer inside a Mawlurk corpse.
- One can be obtained by killing the Pale Lurker in a hidden area behind the Colosseum of Fools.
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