The Infinite Mystery

Qin Feng observed the formation that was protecting the palace curiously. The previous counterattack of the formation was very terrifying, making Qin Feng not dare to do anything reckless.

"Thunder Spear!"

After thinking for a while, Qin Feng chose to release his Battle Spirit.

Immediately, his cultivation base increased by two minor stages as he stepped into the Late Stage of the Profound Spirit Realm.

Ready to attack, Qin Feng flew in the sky and held the Thunder Spear in his hand. Lightning flashed as black clouds slowly covered the sky and then they started rumbling with thunder.

"Thunder Spear!"

Hundreds of bolts of lightning flashed on the Thunder Spear as Ye Xiao shot it towards the formation, wanting to break apart the formation.

"Bang!"

The instant Qin Feng's Thunder Spear collided with the formation that was protecting the Palace, a loud explosive sound rang out and white fog immediately covered the entire formation, making it impossible to see what just happened.

But, in the next moment, the ground shook wildly as the formation slowly started to break apart.

"This really worked!" Qin Feng's eyes light up when he noticed the formation slowly breaking apart but it was at this moment when something strange happened, causing Qin Feng's face to stiffen.

The formation that was slowly breaking apart suddenly started to heal itself. It started recovering and next to no time, it recovered to its peak.

"This...?" Qin Feng could not help but be astonished when he saw this. It has to know that Qin Feng's previous attack was enough to kill even an Early Stage Heaven Ascension realm martial warrior.

Although this attack of his was extremely terrifying and caused the formation to break for a while, it was still not enough to truly break the formation.

"What should I do?" Qin Feng muttered and started thinking once again. The good thing was that this time, the formation didn't counterattack Qin Feng, otherwise, who knows what kind of destructive Thunder Spear Qin Feng would have faced?

"Looks like, I can only do this!" Thinking for a while, Qin Feng finally decided to release his second Battle Spirit, KING.

"Release, KING!"

Qin Feng first retracted back the Thunder Spear and then he immediately released his second Battle Spirit.

Instantly, his entire body started shining with golden light as a golden smoke flew out from Qin Feng's body before slowly manifesting into a gigantic golden humanoid figure.

This Golden Figure's face was a blur just like the real Thunder Spear depth inside his soul, making it impossible for Qin Feng to see what this Golden Figure looks like.

Qin Feng didn't know what to do next. Although this 'KING' was his second Battle Spirit but unlike his Thunder Spear, Qin Feng could tell that with his current strength, it was impossible for him to control the KING.

Even after thinking for a while, Qin Feng could not find out how to make use of his Second Battle Spirit.

"Sigh!" Letting out a sigh, he looked at the KING and said, "Can you help me to break this formation?"

When Qin Feng said this, he felt as if KING was nodding its head in response. Then a mighty and domineering voice echoed out that not only spread Qin Feng's surrounded, but also in the entire dungeon world.

"Shatter!"

Yes, KING only spoke one word, "Shatter" and Qin Feng saw the formation in front of him instantly shattered into countless pieces before transforming into energy and dissipated in thin air.

It was at this moment when a thought appear in Qin Feng's mind that surprised him greatly. Qin Feng raised his head to look at the KING but before he could even look at it, the KING has already transformed into the Golden Smoke and vanished.

The thought that appeared in Qin Feng's mind was from his second Battle Spirit KING. It told Qin Feng not to call it out before increasing his strength and cultivation base to the Heavenly Soul Realm.

It was the first time when Qin Feng heard about a cultivation realm called Heavenly Soul Realm. But there was no need to worry, sooner or later, he will definitely get to know about this cultivation realm.

Anyways, it was not the time for him to thought about these things. Now that the formation was destroyed by the KING, Qin Feng immediately took a few steps forward, opened the door of the Palace, and entered.

"What is this place?"

Qin Feng could not help but voice out his doubt because he could feel a strange aura at this place. He couldn't help but frown.

It was as if Qin Feng has arrived in an entirely new space, he found nothing similar to outside. This was also not a palace but a closed space. And right now, he had the feeling that he was who knows how many meters underground.

He could also feel a strange but monstrous aura surging around him. All he could touch were solid rock walls that made way for him to go forward from two sides.

This place was also very dark and even with Qin Feng controlling the power of thunder and lightning, causing the surroundings to lit up a little, he could barely see the area within a thousand-meter radius.

However, he could roughly figure out what the surrounding area looked like.

As Qin Feng followed the path in front of him and went deeper and deeper, he found the situation was getting worse and worse. Because the monstrous aura was getting thicker and thicker.

"According to my calculation, I have been walking in this underground world for nearly half a day. The deeper I go, the more powerful the monstrous aura will be. But still, I could not find the source of this monstrous aura and I also could not find the end of this path!"

Qin Feng said in a low voice while frowning and walking. Bolts of lightning surrounded his body and protected him.

"Chi!"

Right at this moment, a strange fluctuation of energy appeared right in front of Qin Feng.

"Hmm?"

Qin Feng's heart skipped a beat. However, in the next moment, a sense of vigilance quickly appeared in his heart. His fingers moved quickly and an electric arc flashed. It was like a sword blade as it quickly slashed in front of him.

"Creak! Creak! Creak!"

The moment Qin Feng attacked, he could hear a series of sharp and ear-piercing sounds.

Immediately, a black creature the size of a human infant appeared in Qin Feng's line of sight. It was a creature in the form of a mouse but almost twenty times bigger than a mouse.

Its fur was as sharp as an arrow. Even in the dark night, it was emitting a cold glow. Its body was currently lying there, twitching continuously. From time to time, a pungent black smell would be emitted out from its body.

Blood was flowing out from a deep cut that was around this mouse-type monster's waist. It was clear that Qin Feng's attack had badly injured this monster.

Frowning, Qin Feng took out the long sword and immediately cut off this monster's neck, killing it on the spot.

After killing this mouse-type monster, Qin Feng once again continued to walk deeper while following the path in the middle of the two rock walls.

The deeper he went, the more mouse-type monsters Qin Feng encountered. But they were not his match and were killed by him.

This series of events continued for another half a day. Qin Feng continued to walk deeper and deeper while the mouse-type monster continued to emerge from the darkness and attack him.

Qin Feng would then kill those monsters and then again continue his journey.

After another half a day's time, a gate finally appeared in front of Qin Feng. This gate seemed to be made up of wood but when Qin Feng attacked with his Thunder Slash to break his door apart, he was astonished to see that he even failed to leave behind a single scratch on the gate, let alone breaking the gate.

Seeing this, Qin Feng immediately understood that this door was no ordinary wooden door. It must be made up of some precious wood that was harder than the iron.

Taking a deep breath, Qin Feng tried to open the gate but failed to open it. Then he exerted more strength but still failed to open. Even after exerting his full strength, he failed to open this wooden gate.

Disappointed, he began to look at the Wooden Gate curiously. When he stared at the wooden gate closely, he found a few lines that were like some sort of inscription on this gate.

Looking at those inscription-like lines, Qin Feng immediately understood what should he do next. Qin Feng extended his hand and started to imbue the spirit energy.

When his spirit energy touched those lines, those lines instantly started shining with bright blue light. And after that, his spirit energy started to follow those lines and started spreading throughout the gate.