Thanks to the time he had spent in the Badlands Court, Ji Ning understood that each treasure auction would have many treasures for sale. Treasures of every single type would be sold, and so Ning sold off the vast majority of the treasures he had acquired in the Windsource Ruins. He had been planning on keeping the Eversnow Banner and the Rainbow Cloud World, but he ended up selling them as well.
The Eversnow Banner was quite useful. It had several sinfiends within it and could be used to trap enemies or test out dangerous regions. However, Ning deeply disliked sin treasures. He had planned on temporarily using it since he had a deficit of good treasures, but now that an abundance of treasures was coming towards him he was naturally going to sell it off to buy things he actually liked.