Thieves Retreat is one of the many dungeons in Mortal Shell 2, and you can find it just north of the Nochtean Gate Beacon. This dungeon is all about navigating through a ruined bridge connected by invisible floors. However, the invisible bridge is guarded by plenty of lightning-spewing ghosts, and the pit below is crawling with monsters. There may also be some secrets in the Thieves Retreat dungeon in Mortal Shell 2, so keep your eyes peeled for anything strange or out-of-place.