Beigong Yu

The foremost monster spirit king under the North Sea Emperor, and the greatest manslayer of the North Sea. There’s got to be almost a hundred thousand immortals who’ve died at his hands. Beigong Yu brimmed with so much negative karma that it was on the verge of materializing tangibly. That was clearly the mark of an indiscriminate, bloodthirsty butcher of countless innocents.

He was killed by Lu Yun in the Coretrial Arena.