Mystery Key is a Key in Dark Souls and Dark Souls Remastered.
Mystery Key Usage
- Free Lautrec. Behind a breakable door, on the upper floor of the Undead Church, opposite end of boss entrance.
- If Lautrec is freed, he will be available as a summon for the Bell Gargoyle boss.
- He will also give a gift of one Sunlight Medal when he returns to Firelink Shrine.
- If Lautrec is not set free, he will still escape his imprisonment after the Gargoyles are slain, but gives no gift.
Mystery Key Location
- Found behind the first ladder, after the armored boar, when going through the cellar in Undead Parish.
- Video Location Timestamp 2:54