Dantian has a little field

"Magic Light Shield!"

The Dark Demon King's demon spirit roared and propped up a translucent protective light shield. The [Small Five Elements Sword Formation] was blocked when it hit it!

However, the demon spirit was not at ease. Under the cutting and strangling of the [Small Five Elements Sword Formation], his magic energy was rapidly consumed. The attack and defense were different. Just now, the Dark Demon King's demon spirit attacked and Lin Xu defended. Now it was the other way around.

However, after a few hourglasses, the Dark Demon King's demon spirit could not hold on. He was not Lin Xu. He did not have the Immortal Lotus Heart Seal on his body, nor did he have the fusion of the life master's natal blue lotus. In terms of recovery ability, ten demon spirits combined could not compare to one Lin Xu.

"You are so cruel, you little brat! I have something else to do today, so I won't bother with you!"

Before he finished speaking, the Dark Demon King's demon spirit had turned into a black light and ran away. The protective light shield was shattered without the support of the magic energy.

"Demon, where are you running to!" Lin Xu entered the heart of the World Tree with the purpose of destroying the demon. How could he let him run away like this? He shouted and turned into a stream of light and chased after him.

"Hahaha! Brat, you are the girl from the elves who asked me to deal with you, right? I am in the core of the World Tree now. If you want to destroy me, destroy the World Tree together. Let all the elves be buried with me. Hahaha!"

In the core of the heart of the World Tree, there is a diamond-shaped green crystal the size of a palm. The black light transformed by the demon of the Dark Lord went straight into the diamond-shaped crystal. When Lin Xu caught up, he only heard the demon's loud laughter.

Spider-like green threads gathered from all directions and connected to the diamond-shaped crystal. Green light could be vaguely seen passing into the diamond-shaped crystal along the threads.

Outside the heart of the World Tree, Lin Xu opened his eyes, looked at the high priest Maya and asked: "Maya, there is a diamond-shaped green crystal in the core of the heart, what is that?"

As long as the Nascent Soul clone is not too far away, Lin Xu can know everything that the Nascent Soul clone has experienced.

"Diamond-shaped green crystal? Damn!"

The high priest Maya's face suddenly changed, and her face, which was originally pale due to a lot of consumption, became even paler. "That is the heart core of the World Tree. Once the core is destroyed, the heart will collapse, and the World Tree will not live long!"

"So that's it! No wonder the demon spirit looks so confident!" Lin Xu nodded in understanding, which means that he must destroy the demon spirit of the Dark Lord without hurting the heart core of the World Tree. This is a bit tricky!

"Lord God, did the demon spirit of the Dark Lord get into the heart core of the World Tree?" High priest Maya asked anxiously.

"Well, that demon spirit is no match for my spirit clone, so it escaped into the core! Maya, do you have any way to force it out?"

The high priest Maya shook her head bitterly, and Lin Xu sighed. It seems that he really can't rely on her at all. He still has to find a way himself!

In the heart of the World Tree, Lin Xu looked at the diamond-shaped core that flashed a black light from time to time, frowning. It's obvious that the demon spirit of the Dark Lord must be absorbing the energy in the core to recover. When the opponent recovers, he will come out to fight him again. If he can't beat him, he will hide in the core to recover. Who can bear this endlessly?

Although Lin Xu's recovery ability is strong, it is still a step behind the demon spirit of the Dark Lord, who can rely on the core of the World Tree and continuously obtain power to recover from injuries. If it really continues, the loser will definitely be Lin Xu.

"Hahaha! Boy, aren't you very powerful? Don't you want to get rid of the demon? I'm here, come and get rid of it if you can!"

The Dark Lord's demon spirit laughed wildly. He was now in the heart of the World Tree, which meant he was invincible. Lin Xu had only two ways to deal with him. One was to destroy the heart of the World Tree together with him, and the other was to enter the core to fight him.

The first method would definitely not work. If the heart was destroyed, the World Tree would also perish. At that time, everyone in the World Tree, including Lin Xu, would not be able to escape!

As for the second method, as long as Lin Xu dared to come in, he would not be able to get out alive! After thousands of years of infiltration, the Dark Lord's demon spirit would be greatly strengthened in the heart of the World Tree, while the strength of other people who entered would be suppressed. In the eyes of the demon spirit, Lin Xu was definitely not his opponent!

Lin Xu had also thought about these two methods. Like the Dark Lord, he would definitely not choose the first method. That would be equivalent to destroying the World Tree, and he might even get himself involved. This kind of stupid thing cannot be done.

If the first method doesn't work, then there is only the second method left, which is to enter the heart core of the World Tree and fight the Dark Lord's demon spirit to the death!

As for whether he can beat the Dark Lord in the core, Lin Xu has no time to think about it. He must fight first!

"Swoosh!"

With a move, Lin Xu turned into a stream of light and rushed into the diamond-shaped green crystal.

Although the diamond-shaped green crystal looks only the size of a palm from the outside, it is a huge space with a square of ten miles inside. The Dark Lord's demon spirit is standing in the middle. No, it's not too appropriate to say standing, it should be sitting, because there is a huge black throne under him. It looks like the Dark Lord's demon spirit is condensed with magic energy.

Originally, since this is the heart of the World Tree, it should be full of greenery, but the reality is just the opposite. The gloomy scene made Lin Xu wonder if he had arrived at the land of death.

"Hehe! I didn't expect you to dare to chase me in! How is it? Does it feel good here?" Seeing Lin Xu chasing in, the Dark Demon King's demon spirit smirked triumphantly.

Not bad!

Lin Xu did not rush up, but frowned and looked around. The Dark Demon King's demon spirit must have done something to make this place look like this.

Lin Xu noticed that there was a trace of green light injected into the edge of this space. This should be the life force from the World Tree, but without exception, they all turned into dark dark magic energy, which surprised Lin Xu secretly, but at the same time, he suddenly realized it.

Lin Xu was a little strange before. The Dark Demon King's demon spirit should need dark magic energy. The attributes of life force and dark magic energy are completely opposite. It can be said that water and fire are incompatible. How can he absorb life force to restore strength?

Now Lin Xu finally understood that, in essence, the life force and the dark magic energy are of the same origin. The dark magic energy in the heart of the World Tree is transformed from the life force, although Lin Xu does not know what method the Dark Demon King's demon spirit used to transform it.

Since they are of the same origin, the Dark Demon King can transform the life force into dark magic energy, so why can't he transform the dark magic energy into life force in reverse?

Such a thought suddenly came to Lin Xu's mind. Before he entered the Fountain of Life, he was not afraid of the dark magic energy in the Land of Death, but at that time he used his own life green lotus to absorb it. Lin Xu always thought that it was his own life green lotus that purified the dark magic energy and turned it into pure energy for him to absorb. Now it seems that he thought wrongly. The life green lotus did not purify, but directly transformed the dark magic energy into life force!

If the natal green lotus can do it, then Lin Xu can do it now, too. He has now merged with the Nascent Soul of the natal green lotus. Although it is a clone, the difference between it and the natal Nascent Soul is only the strength. The Nascent Soul clone can do what the natal Nascent Soul can do.

After figuring this out, Lin Xu no longer used his power to resist, but took the initiative to absorb the surrounding dark magic energy into his body. As expected, the dark magic energy that looked like poison to the elves could not cause any harm to him at all. As soon as it entered the body, it naturally transformed into life force.

"Interesting! Now the Dark Demon King's demon spirit is dead!"

Lin Xu was secretly happy. The Dark Demon King's demon spirit's greatest reliance was the dark magic energy in the heart core of the World Tree. Now the dark magic energy was ineffective against Lin Xu and was a tonic. What was there to worry about?

"Small Five Elements Sword Formation, go!"

Lin Xu smiled coldly, he was too lazy to talk nonsense with the Dark Demon King's demon spirit, and directly urged the five elements of the spirit sword to form the [Small Five Elements Sword Formation] to kill the demon spirit.

More than a thousand years ago, an elf priest once entered the heart of the World Tree and wanted to destroy the Dark Demon King's demon spirit. As a result, he was led into the core by the demon spirit and was destroyed by the dark magic. The Dark Demon King's demon spirit still remembered the panic and despair on the face of the elf priest. He thought he would see it again on Lin Xu's face. Who would have thought that the other party just frowned and looked around for a while and then sneered and attacked him. How could he not be angry.

"You don't know how to live or die! I will let you know now that I am invincible here! Die!"

With a roar, the Dark Demon King's demon spirit stretched out his hand and beckoned. The dark magic energy diffused in this space quickly gathered and turned into a huge black skull, swallowing Lin Xu in one gulp.

"Hehe! Boy, let's see how arrogant you are now! I will melt you into slag completely!"

Seeing that Lin Xu was swallowed by the black skull without any resistance, the Dark Demon King's demon spirit was stunned at first, and then laughed triumphantly, gathering all the dark magic energy in the space on the black skull, wanting to use the corrosive properties of the dark magic energy to completely wipe out Lin Xu.

However, a quarter of an hour passed, and Lin Xu's breath did not weaken at all. Half an hour passed, and Lin Xu's breath still did not weaken at all, but seemed to be strengthened.

"How is it possible? How can this kid hold on for so long? This is too abnormal!"

Thanks to the viewer "'Ajun'" for the reward of 100 starting coins!