Cain's eyes nearly left his skull as he came to that realization. He was not a stranger to Natural Inheritance since he had obtained one very shortly after starting his path of cultivation. In essence, once a place harnessed enough energy and power, it could give birth to a treasure—this treasure could be a weapon, armor, or even a technique. The more precious the place and energy gathered, the stronger the Natural Inheritance would be. If Cain's guess was right, then what he faced right now was a Natural Inheritance born directly of Aether itself!