Joe Di stared in shock at the terrifying flames before him. He had never expected that his Cosmic Flame would erupt with such frightening power after encountering the Lunar Heart and Radiant Heart.
The protective array he had set up was already reduced to nothing by the Cosmic Flame devouring the Lunar and Radiant Hearts. And that was a sixth-level divine protection array. Joe Di suspected that if he weren't a Saint Physique, or if the flames weren't his own, he would have been obliterated just like the outer array.
The heat of the Cosmic Flame kept climbing, and Joe Di could even feel the space trembling. Flames powerful enough to make space itself shudder—how terrifying was that?
As the Lunar Heart and Radiant Heart were continuously devoured, the color of the Cosmic Flame grew increasingly pale.
The trembling of space grew stronger and stronger, to the point that even Charlotte Ling, who was cultivating in seclusion far away, sensed it. She immediately arrived outside Joe Di's cave residence, but her divine sense was blocked by the frenzied Cosmic Flame and couldn't penetrate at all. At this moment, Charlotte Ling could only call out from outside, "Brother Joe, are you alright?"
Joe Di quickly replied, "I'm fine. I'm cultivating something right now. You should go back and stabilize your cultivation first."
Even though Joe Di hadn't explained, Charlotte Ling could guess—Joe Di's flame was probably advancing. Since he possessed both the Lunar Heart and Radiant Heart, if his flame needed both to advance, it could only be the Cosmic Flame.
Charlotte Ling had heard of the Cosmic Flame. Since ancient times, very few cultivators had ever condensed it, but there were a handful. However, the Cosmic Flame was the hardest to advance. In fact, once it reached the Divine rank, it was nearly impossible to advance further.
To advance the Cosmic Flame from Divine Flame to Saint Flame, there were two methods. One was to use a Fire Origin Pearl. But Fire Origin Pearls were extremely rare, and even those who had them were reluctant to use them just to advance their flame.
Aside from Origin Pearls, the other method was to use both the Lunar Heart and the Radiant Heart simultaneously. Both the Lunar Heart and Radiant Heart were just as rare. In terms of value, they were not much less precious than Origin Pearls.