Ye Xiao stood up after breaking through to the Fifth Stage of the Martial King Realm and looked down.

Some time ago, there used to be a small pond filled with source fluid here but now, only a deep pit remained.

Ye Xiao removed the illusion formation and walked out. He did not see anyone this time.

From the looks of it, everyone has already walked out of the underground cave after exploring every bit of it.

Seeing no one here means all the treasures inside the underground cave have already been taken by the geniuses.

Ye Xiao did not waste his time searching for treasures here. He walked out of the cave and flew in a random direction.

After breaking through to the Fifth Stage of the Martial King Realm, his speed of flying became too fast.

In the blink of an eye, he travelled hundreds of meters. Soon he arrived in front of a mountain that was erupting with a volcano.

The weather here was hot. At this time, he felt some movement from the Beast Fire within his body as if it was scared of something here.

Ye Xiao was surprised. It was the first time when the Beast Fire was scared by something but after thinking of something, Ye Xiao immediately became excited.

After merging with the memories of the Ancient Pill God, Ye Xiao has already gained too much knowledge regarding the Fire Souls.

He became excited because according to those memories, the Beast Fire scared because it felt the existence of True Fire Soul here.

Rumble! Rumble!

Ye Xiao rushed toward the erupting volcano, but suddenly, a crack appeared on the ground in front of him, which immediately spread straight in line, resulting in the ground dividing up.

"Holy shit!"

Ye Xiao was not ready and directly fell down in the abyss that appeared after the ground was divided into two and a deep pit was created.

A scalding aura assaulted his face, which made a man like Ye Xiao who had the Beast Fire to feel a burning sensation throughout his body. It could be seen just how strong that heat was.

He hurriedly covered his body with the spirit energy to protect it from burning. He was certain that even a Martial Emperor Realm martial artist would find it difficult to endure the heat here.

He kept falling down, the situation must be worse down there.

"Wings of the Divine Dragon!"

When the ground below appeared in Ye Xiao's line of sight, he immediately uses the Wings of the Divine Dragon and landed perfectly on the ground.

What appeared in front of him was a river of flame. He also saw that the stones here were very tough. He couldn't even cut them apart even with the Sea Dragon Spear and with his current cultivation.

After all, these stones can withstand a high temperature!

Right now Ye Xiao felt a little regretful. He thought he should not have rushed toward the erupting volcano without a second thought.

The temperature was already frightening enough. He was confident that even the Martial Emperor Realm cultivators would be burned alive if they came here. Only a person with a Beast Fire or a Fire Soul that can help them resist the temperature here can survive.

After two hours passed, the entire body of Ye Xiao was covered in sweat. He felt like he was about to be baked dry.

Suddenly, a deep crack appeared on the ground around 20 meters away from him.

Just as Ye Xiao took a step, he felt a powerful hot stream surging out from deep within the crack. In the blink of an eye, Ye Xiao felt extremely hot as if he was being burned alive by fire. This feeling almost had suddenly made him softly lay paralyzed on the ground.

Suddenly a red thing shoots out of the crack, with even more intense scorching heat, making Ye Xiao even more uncomfortable.

"Red Fire Soul, it is actually a Red Fire Soul!" When Ye Xiao saw the fire soul, he shouted out loud.

Without wasting his time, he immediately pounced toward the Fire Soul to capture it but at this moment, the movement of Beast Fire in his body started to become big and big as if, it wanted Ye Xiao to move away from the Red Fire Soul.

Ye Xiao directly ignored the Beast Fire. Who would care about a Beast Fire if there is a True Fire Soul in front of them?

At this moment, as if that Red Fire Spirit, which was floating in the air felt something, it immediately shoots out toward Ye Xiao.

"What is going on?"

Seeing this, Ye Xiao was shocked.

Why did the Red Fire Soul fly toward him?

The moment Red Fire Soul flew toward him, the Beast Fire in his body started to struggle intensely as if it wanted to break free from Ye Xiao's body and escape.

Shua!

But it failed. The Red Fire Soul entered Ye Xiao's body.

The moment the Fire soul entered into Ye Xiao's body, Ye Xiao's handsome face suddenly distorted from pain as she let out crisp and sharp screams.

"Ahhhh!"

Ye Xiao let out a series of mournful screams in pain while rolling on the ground. He did not expect that when fused with the True Fire Soul, the pain will be this unendurable.

Before this, he has also merged with the Beast Fire but the pain at that time was not even thirty percent of what he was feeling right now.

What is more, he is already a Fifth Stage Martial King Realm martial artist now and his body was much stronger than the time when he merged with the Beast Fire.

"This is necessary because, after the fusion with the Fire Soul, your flame and body will undergo advancement. That's why you must suffer pain even more severe than what you had experienced previously."

At this moment, he heard a sound in his mind. He could tell that it was the Divine Soul Emperor Dragon's voice.

Ye Xiao felt like he was dying.

"It is very painful..." Ye Xiao screamed.

Although he was in agony, he knew that only by enduring the pain could he successfully merge with the Red Fire Spirit.

"Ahhhh!"

At this moment, he suddenly felt as if something was devouring the Beast Fire from his body which once more intensified the pain he was feeling.

He tried to see what is going on, but when he looked in his body, he was surprised to see that the Red Fire Soul was actually devouring the Beast Fire and what is more, it looked as if it was about to evolve.

He immediately understood everything.

The Red Fire Soul chose to merge with him because of the Beast Fire within his body which could help it to evolve and become a Blue Fire Soul.

No wonder the Beast Fire was struggling hard to escape. It already knew what its fate would be if Ye Xiao tried to merge with the Red Fire Soul.

"Ughh! Ahh!"

Although he was surprised, he could not even make the expression on his face that of a surprised expression because of the intense pain.

The incomparably scorching heat that was constantly increasing within his body made him feel like his body was about to melt.

However, he was happy since his body was still fine although it was very painful. The heat that was radiated from the fusion of the Red Fire Soul and the Beast Fire within his body was even hotter than the river of flame here!

Ye Xiao could do nothing but bear it. He felt that if he could master such a powerful flame, he would be unimaginably strong.

Incomparably hot flames were frantically destroying his body, causing him endless pain. If his will was not strong enough, he would have fainted long ago, but he could definitely not faint under such circumstances.

The two types of fire in his body were fiercely fighting with each other right now.

Ye Xiao knew very clearly that the progress of fusion was very slow. Thinking that he would stay like this, enduring the pain here for a long time, he couldn't help but shout out loud …

The river of flame was filled with heart-wrenching screams. Time slowly continue to pass and after more than five days, his voice suddenly stopped and the river of flame calmed down again.

"H-Haha... Hahaha!"

After a short period of silence, a burst of arrogant laughter sounded out. A pillar of fire suddenly gushed out and Ye Xiao, with a huge pair of Blue-coloured fire wings on his back, shoots out toward the sky.

He successfully merged with the Red Fire Soul while the Red Fire Soul also evolved into the Blue Fire Soul after devouring the Beast Fire.

After a few days of torture, he finally got the reward he deserves. After flying out of the abyss, he continued to fly in a random direction.