The disciples of the Dark Sun Gwyndolin, Blades of the Darkmoon serve Gwyndolin by hunting the guilty. This covenant allows players to invade another's world as a blue spirit of vengeance. Join by interacting with Gwyndolin at the entrance to his domain in Anor Londo.
- Blue Eye Orb: Invade world of player in Book of the Guilty. Subdue player to acquire Souvenir of Reprisal. These mystical orbs are granted to Blades of the Darkmoon, knights who serve the Dark Sun Gwyndolin, so that they may serve the Gods in meting out vengenance.
- Darkmoon Blade Covenant Ring: Ring granted to those bound by the Darkmoon Blade Covenant. Answer Dark Sun Gwyndolin's summoning. Gwyndolin, all too aware of his repulsive, frail appearance, created the illusion of a sister Gwynevere, who helps him guard over Anor Londo. An unmasking of these deities would be tantamount to blasphemy.
- Darkmoon Blade: Miracle granted to those bound by covenant to Gwyndolin, Lord Gwyn's lastborn. Boost right weapon with rays of Darkmoon. The power of the rays of the Darkmoon are manifested in vengeance, and the deeper the animus, the more devastating the attack.
- Darkmoon Talisman: Medium for casting miracles of the Gods. Granted to Darkmoon Blade knights, adherents to the Covenant of the Dark Sun Gwyndolin. This talisman demands dutiful faith from its owner, but has very high miracle adjustment.