Xuan Yao is the merman capture target in the fifth world. He is sealed in a black swamp within an Eight Trigrams Formation. He appears as a colossal mutated fish beast with black scales, crimson eyes, and enormous fangs, described as three to four zhang wide and seven to eight zhang long. He is in a frenzy, repeatedly attacking the barrier set by a master cultivator. His sorrowful cries resemble a merman's lament from the Classic of Mountains and Seas. He has high stamina and attack power but low fertility, with special abilities Aquatic Ecstasy and Dual Weapons. Ning Wanguan vows to rescue him.
