Dungeon Pass

The Dungeon Pass is the ownership item, called the Witch Queen Dungeon Key in game, that gates access to the Duality dungeon from the Witch Queen expansion.

The A Single Thread quest, given by Suraya Hawthorne in the Tower, is a Season 17 Legendary quest that requires ownership of the Dungeon Key. Its two steps are to complete Duality and then return to Hawthorne in the Tower Bazaar. Duality sits on the Moon, below the landing zone for the Derelict Leviathan, inside Calus's Mindscape.