Actually, calling them clones or avatar projections is a huge stretch. Chen Xuan had just confirmed this repeatedly with Huntian Di and Wujie Jian Di: the origin of these mysterious Immortal Emperors tainted by demonic Qi is extremely complex and bizarre, and they can by no means be classified as mere split spirits.
At this point, Wujie also spoke up: "I recognize one of them as well, known as the Purple Sun Immortal Emperor. Back in the Era of Myriad Emperors, the Purple Sun Immortal Emperor participated in the Battle of a Hundred Emperors—the only one of its kind across eternity. I watched with my own eyes as he was killed by another Immortal Emperor in that super-scale battle."
The more Chen Xuan listened, the more astonished he became.
Chapter 5426