This was a damp yet dark underground cave. The spiritual energy was dense and could turn into mist. It was full of twists and turns. There were stalactites hanging upside down as drops of liquid dripped onto the ground, emitting a "Drip Drip Drip Drip Drip" sound.

Suddenly, in the silent catacombs, spiritual light appeared. Waves of ripples spread through the air like water ripples. With a flash of light, four figures suddenly appeared in the catacombs.

"This place is indeed well-hidden!" Looking around, Ling Yun nodded with satisfaction and laughed.

"Your Highness, can we start now?" Although he had already adjusted his condition and his heart was as calm as still water, Ning Tianya still could not help but ask.

"It's done." Ling Yun nodded.

"Where is the earth fire?" Ling Yun turned to look at Liu Xian.

In this world, there were many strange flames. There were cultivation techniques for warriors, such as Ling Yun's stellar vitreous body. When they reached the third level, they would be able to cultivate a Star Glazed Fire.

For example, the Divine Flame of the Nine Suns cultivated by the core members of the s.

Some were born with destructive power, but those flames were extremely tyrannical. The temperature of the flames were very high, and they even had their own consciousness. It was very difficult to refine them for one's own use.

The other type was called earth fire, and it was born deep underground, where the spirit energy was rich. The magma was formed by a type of earth fire, and although the temperature of this type of earth fire was still very high, it could be used by itself due to the tyrannical flames.

earth fire s were further classified into three ranks, Heaven, Earth, and Human, according to their flame temperature and size.

The might of that powerful heaven level earth fire was already not inferior to the bizarre flames that were born from ordinary heaven and earth. Flames of this level could even be easily melted by an Emperor Level ore of the seventh step.

Within many of the powerful forces in sect, there were earth fire s that were used for refining pills and refining pills.

"It's at the bottom of the underground cave. I set up the concealment array." Liu Xian's expression turned serious as he said that, and led the three of them to the depths of the catacombs.

After a while, Ling Yun felt that the underground cave did not feel the slightest bit of wetness. On the contrary, he could feel a violent and scorching aura.

Ling Yun's eyes became serious. Even though they were quite a distance away and also blocked by Liu Xian's array, there was still heat wave coming from it. From the looks of it, this earth fire was not ordinary.

With a thought from Ling Yun, the Tai yin-yang meridian activated and transformed all of the spirit energy in its body into fire spiritual energy, absorbing the berserk fire spiritual energy s in the air.

In this world, other than a few existences with unique constitutions, only he would dare to recklessly absorb and refine the earth fire's spirit energy.

Not only was the earth fire violent, it was also a kind of fire poison that struck terror in people's hearts. This was the reason why many powerful fire attribute martial practitioners used the location of the earth fire as their holy land of cultivation and didn't dare to absorb too much of it.

Ling'er was like a fish in water. After all, her true form was that of a phoenix, a true fire spirit.

Liu Xian was also fine, with his spirit energy reaching the Martial Sovereign and mental energy reaching the powerful cultivation of the sixth stage, the aura emitted by the earth fire could not do anything to him.

He looked at Ling Yun in astonishment, but when he thought about the phoenix's bloodline flowing in Ling Yun's body, he understood.

Ning Tianya was fine as well. He had a stooped back and was walking with ease, showing off his strong background. It let people know what it meant to be a skinny camel that was bigger than a horse.