History of Dungeon Pass

The Dungeon Pass is the paid ownership item that gates access to the Duality dungeon. The A Single Thread quest, given by Suraya Hawthorne, unlocks Duality and can only be started by accounts that own the required item. The Destiny 2 wiki names this requirement the Witch Queen Dungeon Key, and sources use the names Dungeon Key and Dungeon Pass for the same item.