Dark Sun Gwyndolin

 is both the leader of the Blade of the Darkmoon and an optional boss. He is the youngest son of Gwyn, Lord of Cinder and the final remaining deity in Anor Londo. He is voiced by Harry Lister Smith.

Location
Gwyndolin is on one of the lower levels of Anor Londo, accessed through the spiralling elevator. He can only be reached through wearing the Darkmoon Seance Ring, which in turn is found in the The Catacombs.

Plot
Gwyndolin initiates players into the Blade of the Darkmoon Covenant. He accepts Souvenirs of Reprisal in exchange for leveling players up in the covenant.

Arrow Spread
Gwyndolin will slightly raise up and shoot multiple arrows at the Player. Blockable as they do not use much stamina. Alternatively, the Player can stand behind the pillars so that the arrows hit the pillar instead. Note that on new game+++, If all the arrows hit the Player without them blocking it, death is certain.

Orb Spread
Gwyndolin will charge up his catalyst and shoot a cluster of homing blue orbs at the Player. Deals heavy damage if they connect. Recommended action is to hide behind the pillars as the orbs cannot go through them, or roll under it.

Sphere Shot
Gwyndolin will charge up his catalyst and shoot out a huge magic sphere which travels at great speed. Possible to dodge by rolling directly under it or blocking it with a good magic shield. The sphere can pass through the pillars though, so hiding behind them is not recommended.

Drops
Upon defeating him players obtain the Soul of Gwyndolin. In the corridor behind him there are also two chests containing Miracle Sunlight Blade and Brass set. The chest located on the left side contains nothing as for it is a trick by the makers.

Defeating Gwyndolin grants Domhnall of Zena the ability to sell Gwyndolin's set, most notably his helmet, which increases the power of miracles.

Strategies
The fight against Gwyndolin takes part in a corridor stretching on for infinity.

He's not one of the hardest bosses, of his three attacks two can be avoided by ducking behind the pillar, while the last is relatively slow moving. The only issue in the fight is really catching him, as he teleports away when a player approaches. Thus the best time to run up to him is when he's just finishing off his arrow attack, as he takes a few moments to recover.