He Xuan is a ghost of Supreme rank and one of the Four Great Calamities. He is a powerful water demon that emerged from the Kiln by devouring all ghosts within. Despite reaching Supreme level, he rarely comes out to cause trouble and keeps a low-profile. Very few people have seen him before, therefore, he’s of little concern. His base is the Black Water Demon Lair, which is guarded by his giant skeleton fish.
(Source: Heaven Official's Blessing Wiki)
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