When the white, bony hand grasping the soul-calling flag appeared, even the King Stage expert Pang Qianyuan felt a sense of shock in his heart.

The individual was not some unknown nobody.

The Cadaverous King, similar to the Ichythian King, was one of the Four Pestilence Kings.

How could the Umbra Cave beneath the Astral Sage College actually attract the attention of two Other Kings? 

This was completely abnormal.

Others, especially those that had reached the Other King Stage, were extremely territorial. Whatever territory the Ichythian King controlled, the remaining Other Kings would take heed to avoid the area completely, to prevent any conflict between them.  

And yet a second Other King had appeared.

Additionally, neither of them seemed to be in conflict with each other. This meant that there was some sort of unspoken agreement. For what reason could they choose to let go of their differences and cooperate?

Unless this was an order from an even mightier existence? 

Other Kings like the Ichythian King and...