Xuan Wu is one of the True Spirits. It was a giant black turtle that was around 50 to 60 feet tall. There were countless runes surging over its black shell, forming a light barrier that presented quite a mystical sight to behold.
In terms of overall ability, this Xuan Wu couldn't even begin to compare with other true spirits like True Dragon or Heavenly Phoenix, but it definitely possessed the best defensive prowess. After all, Xuan Wu had always been renowned for its durability among all true spirit beings.
Notes: The Giant Turtle in the Small Asura Realm contains its blood although it isn’t very pure.