In this ultimate form, the Underground King's speed, strength and defense will be greatly improved, but it can only be maintained for a period of time and cannot last for long.
While everyone was in awe, the entire underground world had undergone earth-shaking changes. All the buildings had disappeared, replaced by an endless ocean of magma.
On the vast ocean of magma, two figures faced each other, the Holy Lord Thunder and the Holy Lord Demon Slayer. Both of them looked upwards in unison.
In the void, floating on the left side is Fairy Zixia, while on the other side is the Underground King, whose whole body is glowing with red light.
Today's Underground King has a completely different form than before. His skin is translucent, and he is the image of a true underground man.
And on his body, there is a human-shaped shadow that is completely condensed from the energy of the earth's core, ten meters high, shrouding it.
This huge human-shaped shadow, holding an earth-fire sword, is lifelike, and the temperature it exudes is unimaginable.
The light overflowed, and the entire imperial capital was now filled with a murderous atmosphere.
Now the twelve iron cities and the mountain walls in front of the imperial capital have all been reduced to nothing by the magma, and the entire space has become even more empty.
All the soldiers retreated to the central area and watched from a distance, trembling in their hearts and not daring to come any closer.
"The aura has become stronger." The Demon Slayer Holy Lord narrowed his eyes slightly, feeling a little surprised. After all, in the realm of Emperor Wu, it is very difficult to improve the aura.
Moreover, when the Underground King was fighting Fairy Zixia just now, his aura plummeted and his body was also injured.
But now that the "Ultimate Form" has been activated, not only has the aura reached its peak, but even the injuries on the body have completely disappeared.
"That human being, I will join forces with you." The Underground King was the first to speak out to Feng Wuhen. There was no anger in his voice, replaced by a domineering aura that dominated the world.
This sentence made people stunned for a moment.
The Underground King actually wants to join forces with humans?
Could it be that even after turning on the "ultimate form", the Underground King still doesn't have the confidence to defeat Fairy Zixia?
"Okay." Holy Lord Thunder only responded with one word. This was the situation he wanted to see.
"Monarch Yue, let go of the anti-imperial forces for the time being and use all your strength to fight against the invading enemies." The Underground King ordered. The reason why he joined forces with Feng Wuhen was not because he was afraid of Fairy Zixia.
But he knew clearly in his heart that there was a gap between him and Fairy Zixia.
The "ultimate form" can only last for half an hour, and he has just broken through to the realm of the Martial Emperor. His foundation is unstable. If he rashly uses the ultimate energy of the power of blood, he may damage his foundation.
But right now, in order to deal with Fairy Zixia, the Underground King has no other choice.
"Your name is Empress. I have underestimated you. You have really made me see the power of human beings." The Underground King's personality underwent a 180-degree change, and he completely calmed down.
But beneath its calmness, there is more violent energy.
If the underground king just now was just a crazy tiger, but now he is a tiger that wakes up from its slumber, which is completely different.
"It seems that you are quite confident in your power. Let me see." Fairy Zixia said coldly.
As soon as he finished speaking, the Underground King's eyes changed and he waved his right hand instantly.
In an instant, the entire magma ocean shook, and then, magma pillars hundreds of meters in diameter burst out from the magma ocean.
These magma were not ordinary magma, they were all fire from the center of the earth, and then condensed into a lifelike earth fire dragon that was 10,000 meters long, and then directly penetrated the void and blasted towards Fairy Zixia.
As you can imagine, Fairy Zixia's "Elemental Transformation" was executed very timely. When the local fire dragon penetrated her body, she had already turned into a puff of gas and dissipated.
However, what is surprising is that this giant earth-fire dragon did not crash into the magma ocean, but instantly changed its direction and flew to the right.
The speed of the giant earth fire dragon was so fast that it reached a thousand times the speed of sound, and a buzzing sound erupted in the void.
When everyone couldn't understand what this giant earth-fire dragon was going to do, a surprising scene appeared!
In front of the giant earth fire dragon flying, the void twisted, and then, Fairy Zixia's body actually appeared.
But just in the blink of an eye, Fairy Zixia, who was about to appear, turned into an element and disappeared again.
Perhaps in the eyes of others, this was just a coincidence, but all the Martial Lords present, including the Demon-Slayer Saint and the Thunder Lord, all looked shocked.
"What!?"
This was obviously not a coincidence, but the Underground King was able to clearly capture where Fairy Zixia appeared after she had used "Elemental Transformation" to dissipate.
This scene is too weird. You must know that Fairy Zixia's spiritual consciousness has reached the sixth level, and the Underground King's spiritual consciousness is only at the peak of the fourth level. How could he know in advance where Zixia Fairy's "elemental transformation" will appear?
?
However, what happened next had to make them believe it.
No matter how Zixia Fairy uses "Elemental Transformation" to disappear, the Earth Fire Dragon can always capture her position.
"Escape, I want to see how many times the immortal energy in your body can be used to transform into elements." The Underground King stood on the spot, controlling the giant earth fire dragon, and said calmly.
"What's going on?" Everyone was stunned and looked at each other. How did the Underground King capture Fairy Zixia's aura?
At the same time, on the ruins of Iron City outside the imperial capital, the Savage Fierce Demon also pointed at Xiao Wenhao and the other three, and cursed: "Isn't it great to beat me just now? Try it again now!"
Xiao Wenhao and the others gnashed their teeth, because Yue Jun and others had already set their sights on them.
In just an instant, the situation reversed. They who originally had the advantage in numbers were now facing eight Martial Lords!
"Marshal, those traitors have escaped." Bai Ge immediately reminded Yue Jun.
Yue Jun and others looked around and found that Lin Yun, Ri Jun and Mo Cheng had already flown away, obviously not wanting to get involved in this battle anymore.
Yue Jun was extremely torn in his heart. He was thinking about whether to capture the top leaders of the anti-imperial army or to stay and deal with these outsiders.
The top leaders of the anti-imperial army are currently exhausted. As long as he is given a few more minutes, he will definitely be able to capture them all.
But now the Underground King has ordered him to deal with the group of outsiders first, which makes him feel very confused.
After some mental struggle, Yue Jun still ordered: "Deal with the foreign enemies first. This is the king's order!"
As the subordinates of the Underground King, they had no choice. Although Yue Jun had great hope in his heart that he could kill his brother here, he still followed the Underground King's order.