Board Thread:Lore Discussion/@comment-25958616-20150428030930

After the War of the Ancients, Seath was granted dukedom by Gwyn for his contribution against the Ancient Dragons. By the time you fight Seath he's locked away insde the Duke's Archives, his mind eroded by madness, but when did he move in and why? I believe Seath conducted his research and experiments in Ash Lake before he moved into  the Duke's Archives. Gwyn, his kin and loyal soldiers built Anor Lando after the war  to rule over Lordron and the rest of the world. While the gods were shaping the world in their image, Seath was busy toiling away in his research for immortality. What started out as innocent research eventually turned into nightmarish experiments. Hand maidens and Firekeepers alike were abducted by his Crystal Golems and Six-Eyed Channelers and brought back to him only to be turned into Pisaca's.

This may have sparked Havel's hatred towards Seath and caused him to view sorcery as a form of evil. Havel also conducted his own research to fight against Seath's sorcery and as a result developed the Great Magic Barrier to protect himself. The rock armor he's had since the war against the dragons also has high resistance to magic, but whether or not his armor already had this resistance during the war is unknown. When he thought he was ready to fight, Havel made his way down to Ash Lake to confront Seath. What he didn't know was that Seath was well aware of Havel's intent from his Channelers reporting his actions, giving him more then enough time to prepare.

While Havel was so concerned in killing Seath he didn't notice the signs of a Rebellion brewing in the world. Humans that were fed up with the rule of the Gods decided to start a rebellion using occult weapons, which is to the Gods like lightning is to dragons. With the threat of a magic immune warrior after his life Seath informed Gwyn of the Occult Rebellion before they were ready to attack Anor Londo. Now that Gwyn was on edge with the threat of humans that possesed the power to kill him after his life Seath put his next plan in motion. Informed that Havel was in the Great Hollow, Seath sucker punches Havel and disposes his Great Magic Barrier in the arch tree and plants the occult club on his unconcious body. With Havel apprehended with the occult weapon on him, Seath presents him to Gwyn as a traitor and a threat to Anor Londo.

Filled with fear and rage at his old battle companion Gwyn sentences Havel to eternal imprisonment in the Undead Tower where he eventually hollows out. Seath is then awarded with the Duke's Archives to help further his research and to help strengthen Anor Londo's defenses against future threats. This might explain why you find Crystal Golems and a Hydra in Darkroot Basin. During the move from Ash Lake to Anor Londo these creatures may have been lost or instructed to stay there and the Moonlight Butterfly may have been tasked with guarding the Divine Ember so Undead warriors wouldn't be able to strengthen their weapons. A bit of a stretch but Seath or his Channelers may have somehow aquired a small fragment of the Whitch of Izalith's Lord Soul and experimented with it, creating the Batwing Demons.  