Moments later, he discovered four pieces of fur of nearly the same size in the four underground chambers that only housed one person each.
He picked up those furs and conducted a Divine Sense Inspection into them.
After a while, he found that these furs were very similar to the jellyfish furs he had encountered on the island where he had previously killed jellyfish.
Upon further careful comparison, he concluded that these furs were indeed identical.
"How did the people of Netherworld Sect obtain these furs? Logically, they shouldn't know which island had sealed the Demon King, and if they knew this secret, it must have been Han Zhanyi's father who uncovered this intelligence from Guanghan Heavenly Palace! After obtaining this intelligence, they would have searched for the Demon King on the island, and somehow they found these four furs. The material of these furs, unknown to me, appears to effectively block Divine Sense Inspection!"