Shahismael

Shahismael was the naga general of the Bloodland Wars.

Bloodland Wars
The Naga Empire was composed by Five Kingdoms, each formed by a different Naga Bloodlines and ruled by one Lord. Shahismael was the Lord of the Asp Bloodline. During the Bloodland Wars his kingdom subjugated the peaceful Greensnake Bloodline, and attacked the Cobra kingdom.

Defeat
Shahadet, Shahismael's first lietutenant, horrified by his Lord's madness, fought and defeated him. The Cobra decided his soul to be severed from the Akasha, so he would never reincarnate.

Severed from the Akasha
The Naga Vedic contained the soul of Shahismael at the deepest reach of the Akasha, chained to the souls of those he enslaved. Shahismael struggled to find a way to spread his madness through the Akasha. If they would succeed he would lose his identity, but the entire Naga race would be filled with his bloodlust.

The Dark Naga
Somehow Shahismael returned in 1198 and awake the Dark Naga.