Doom was added with the Age of Shadows expansion in February 2003. It was the largest and most dangerous dungeon until Stygian Abyss expansion introduced the Stygian Abyss Dungeon.
Several creatures spawn here which are very rarely seen anyplace else (if ever), including Devourers of Souls and Bone Daemons. Certain other more conventional monsters spawn here as well.
Doom is a two-level dungeon. Level Two, detailed below, is known as the Doom Gauntlet. The primary purpose of Level One, aside from the uniqueness of the dungeon and its inhabitants, is to obtain the key to the Doom Gauntlet. At the Gauntlet, several artifacts can be obtained.
Every creature on Level One spawns with Daemon Bones as loot. These are used in the quest The Summoning of Victoria the Sorceress, in order to obtain the key to the Doom Gauntlet.
Both levels of Doom also spawn certain artifacts that are obtainable using the stealing skill. These range in value from approximately 5,000 gold pieces to several million. The highest-end of the stealable artifacts are the Blade of the Righteous (which spawns in the Gauntlet, in the healer's room), the Inquisitor's Resolution (which spawns in level one), and the Ruined Painting (which spawns in the Gauntlet, in the hidden mage shop). The Zyronic Claw has been highly prized on some occasions, but appears to be primarily seen as a "show piece" of late.