The Midnight Flower and the Desolate Iron were located in perilous locations that even someone of Ao Feng's prowess was unable to enter. There should have been no one else other than Zhang Xuan and his direct disciples that were capable of entering those areas to claim those treasures.
As such, he had assumed that it was their doing all along, but clearly, he was mistaken.
Was there another power in the Flooding Sea that was discreetly collecting all the treasures in the Flooding Sea?
"Someone else?" Zheng Yang frowned for a moment before nodding in agreement. "Now that you mention it, that does seem possible. There were several areas we visited where the treasures had already been claimed by someone else. We thought that it was the doing of the Conferred God King of the Nine Skies, but that doesn't appear to be the case…"