In terms of strength, the Mountain Corpse is undoubtedly more powerful than the Skeleton Lord of the Underworld, but in terms of difficulty, the Skeleton Lord of the Underworld in the North City District is definitely more troublesome than the Mountain Corpse.

The reason is very simple. This Undead Lord can summon the surrounding undead to protect itself and attack Xu Mu and others.

As for the other Undead Lord, the Mountain Corpse, it is either because it is overconfident or it disdains to call on the undead to fight for it. In battle, it usually fights alone against several super-class wizards and numerous magicians.

The battle is still going on. In the long dark night, only countless magical lights are shining brightly outside the barrier, like stars in the night sky.

Some magicians were forced to retreat back into the city due to injuries or exhaustion of magic power. However, after they had rested and recovered, they returned to the North City without hesitation and threw themselves into this difficult battle.

Fortunately, this is the land of the dead, the kingdom of the dead, with an inexhaustible supply of undead crystals for magicians to take to restore their magical powers.

Although the recovery effect of these undead crystals decreases with the number of times they are used, their huge number is enough to meet the needs of magicians, allowing them to continuously restore magic energy and maintain battles.

……

"Howl!"

As a dazzling golden-red light cut through the night sky, another of the two remaining heads of the Lord of the Underworld was chopped off.

Severely wounded, it roared in anger, but the pale lightning released by the surrounding thunder halberds tightly restrained its movements, making it unable to escape.

"There's only one head left!"

Seeing this, everyone's tired faces showed excitement.

They knew that if they chopped off this last head, the end of this undead monarch would not be far away!
"Thunder punishment!"

Xu Mu condensed the thunder element with one hand, forming a huge thunder sword, pointing directly at the heart area of ​​the Undead Lord. He knew that the Undead Crystal of the Undead Lord was hidden there. As long as he could destroy this Undead Crystal, the death of this Undead Lord would be inevitable.

Sensing Xu Mu's attack, the Lord of the Underworld immediately used its last head to emit a deafening roar. Under its command, countless undead creatures responded quickly, swarming up, climbing onto its back, and densely gathering around its heart, trying to form a defensive barrier.

Death energy filled the air, and the undead attacked in droves. Countless death energy gathered on the back of the Lord of the Underworld. The huge lightning sword fell instantly, and in a flash, countless undead were instantly annihilated by this blow, and their undead crystals were not spared and turned into dust.

The Lord of the Underworld showed his cunning wisdom and used a large number of undead creatures as a living barrier. The attacks and numbers of the undead formed two continuous lines of defense to weaken Xu Mu's magical attacks.

After blocking the attack of the Thunder Sword, it counterattacks on its own. In this way, even if the Thunder Sword falls on it, it cannot cause fatal damage to it.

"The Beast Tide Summons!"

The summoning constellation was activated instantly, and an enormous white light gate suddenly stood above the battlefield. The light gate opened, and countless huge and ferocious summoned beasts poured out of it.

These summoned beasts fully demonstrated the savage nature of biological instincts. They lowered their heads and rushed forward, ignoring everything, stepping over everything, and trampling all undead creatures under their feet, as if their mission in life was to destroy all obstacles before them!
They ran all the way until they rushed to the light gate on the opposite side and returned to their own world, leaving behind only the ruins on the battlefield and the remains of the undead.

Immediately after the summoned beast disappeared, groups of fireballs began to fall from the sky, as spectacular as a meteor shower. In the sky, the fire mages led by Zhu Meng cast a high-level magic together - Sky Flame Funeral.

Countless huge fire clouds gathered in the sky, dyeing the sky a burning red, as if the entire sky was engulfed by flames.

And from these fire clouds, balls of blazing fire kept falling. They landed on the ground and on the undead creatures, burning them to ashes, leaving only ashes.

The undead army that had just covered the ground like a dark cloud now appeared as a large empty area.

"I'll cover you!"

Du Xiao shouted loudly and completed the last piece of the puzzle of the Magic Star Palace. Then, a huge lightsaber, like the dawn of light, slashed straight towards the neck of the Lord of Haisha. Wherever the sword passed, the space seemed to be split into two.

Xu Mu understood Du Xiao's intention, and without hesitation, he spread all his mental power outward. With himself as the center, he gathered all the lightning elements around him and condensed them into a lightning spear.

The spear took shape in his hand. He used all his strength to throw the spear out. It was like a beam of light, hitting the heart of the Lord of the Underworld directly.

Faced with these two magical attacks that posed a great threat to it, Lord Haisha decisively decided to prioritize resisting Xu Mu's lightning spear.

I saw it raise its last head high, and through its empty throat, I could see black energy gathering in its mouth, shining with a terrifying light!
Immediately afterwards, the sharp dark light suddenly burst out, turning into a shock wave, like a black rainbow of death, roaring from the ground and rushing straight towards the lightning spear thrown by Xu Mu. The two collided violently in the air, bursting out with a deafening sound and dazzling light.

The whole body of the Lord of the Underworld began to change, gradually transforming from the original mercury color to a deep black, just like the transformation from a mercury bone-winged monarch to a black bone-winged monarch.

As the color changes, its strength also increases significantly, and the shock waves it releases are several levels more powerful than before, as if every change in color is a leap in its strength.

At first, the lightning spear could still suppress the opponent's shock wave steadily, but as the color of the Lord of the Underworld gradually turned black, the shock wave actually took the initiative and its power increased greatly. It began to suppress the lightning spear in an attempt to destroy it and completely eliminate Xu Mu!

Before the lightning spear was completely destroyed, Du Xiao's Holy Sword had already fallen down and hit the neck of the Lord of the Underworld heavily. The light of light magic bloomed at this moment, which had a strong restraining effect on the undead creatures.

The dazzling golden light was like the fire in a furnace, as if it was going to melt the Lord of the Underworld.

In just a moment, most of Haisha Lord's neck was cut off, and the entire neck would have been completely broken if it was just a little bit more.

The shock wave that continued to spray out of the mouth of the Lord of the Underworld suddenly stopped because of the severe injury to his neck. The black energy shock wave lost the source of its power and was quickly shattered by the lightning spear.

The spear then struck the undead crystal at the opponent's heart, making a sharp sound of breaking through the air.

The Holy Sword continued to cause fatal damage to the neck of the Lord of the Underworld, echoing the fatal blow of the Lightning Spear. Two extremely threatening attacks fell on it at the same time.

Although Haisha Lord had no visible expression, at this moment, everyone could feel an expression of disbelief on his face, as if deep in the depths of his immortal soul, he couldn't believe that he would actually die here.

“Buzz~~~!”

Suddenly, a shocking roar came between heaven and earth, as if the whole world was shaking with this blow.

A strange cave suddenly appeared on the back of the Lord of the Underworld. It was like an abyss that swallowed everything, as if it was the entrance to a black hole in space. It instantly swallowed up Xu Mu's lightning spear and disappeared along with its powerful energy. "The Cave of Chaos..." Du Xiao's pupils suddenly dilated. He recognized at a glance that this was a magic skill of the Chaos system, a magic that could swallow everything.

The sudden appearance of the Chaos Cave not only swallowed up Xu Mu's Lightning Spear, but also Du Xiao's Holy Sword, Zhu Meng's Thunder Ring Punishment, and various magic skills cast by other magicians around. None of them were spared and were all sucked into the bottomless abyss, as if they were completely wiped out by the Chaos Cave.

"All the magic has disappeared... Only a Forbidden Spell Mage can possess the magical power of so many people. When did a Chaos-type Forbidden Spell Mage appear in our country?" Zhu Meng was filled with surprise and disbelief.

"Be careful... I'm afraid we have found the Ancient King!" Du Xiao looked solemn. The original plan to seal the Ancient King seemed to have failed.

The appearance of the Chaos Cave did not bring any direct threat to anyone. It simply swallowed up everyone's magical attacks silently, and then disappeared without a trace as if it had never existed.

Freed from the punishment of the Thunder Ring, the Lord of the Underworld made a series of movements. It grabbed its three fallen heads, flapped its broken bone wings, and flew away, leaving behind a cloud of dust.

In the battle just now, Du Xiao successfully cut off the last head of the Lord of the Underworld by relying on the restraining effect of light magic. Unfortunately, for undead creatures, what determines their life and death is not the head, but the undead crystals hidden in the body.

As long as the undead crystal is not destroyed, no matter how many heads the Lord of the Underworld loses, it will not truly die. This is the characteristic of undead creatures.

"It seems that everything is over... Did they succeed? But why was the ancient king not sealed?" Zhu Meng stared at the suddenly retreating undead army with a hint of doubt, his heart full of uncertainty.

"Let's go find Han Ji." Du Xiao suggested.

Zhu Meng nodded. As the president of the Ancient Capital Bell Tower Magic Association, Han Ji was undoubtedly the person most familiar with this area. It would be right to ask him if there were any problems.

"Xu Mu, where are you going?" Zhu Meng glanced around and found that Xu Mu was walking straight into the city, so he asked.

"I need to rest." Xu Mu answered weakly with a pale face.

Although the power of chaos is indeed strong, it is also extremely exhausting for him at the moment. If he does not rest in time, he will probably not be able to hold on and die suddenly.

He was now even more exhausted than when he had been pulling all-nighters for six consecutive days.

Seeing that Xu Mu looked haggard, and considering that Xu Mu already had a high level of cultivation, Zhu Meng did not make high demands on him. He just gave him a few simple instructions, and then went with Du Xiao to look for Han Ji.

……

……

At this moment, there was a jubilant scene under the inner city wall, with cheers and shouts of joy intertwined, and everyone was releasing the joy of surviving the disaster from the bottom of their hearts.

After returning to the Clock Tower Magic Association, Xu Muwan rejected the kindness of the healing mage, found a quiet meeting room, lay down without hesitation, and went to sleep in one go.

"It's really exhausting. I feel like even my soul has been drained."

Before going to bed, Xu Mu rubbed his temples, took out the undead vessel rewarded by the system from the storage space, put it close to his eyebrows, and began to absorb the essence in it to replenish his almost exhausted energy.

After fully mastering the power of chaos, Xu Mu unexpectedly discovered that he could restore his energy by absorbing essence.

It is just not clear whether this method of replenishing energy can also improve his mental power level.

After absorbing dozens of essences and filling the emptiness in his soul, Xu Mu slowly closed his eyes and fell into a deep sleep.

……

……

I don’t know how long it was, but when Xu Mu opened his eyes again, he found that there was an extra layer of quilt on his body. I don’t know who covered him with it.

After a good sleep, Xu Mu felt refreshed.

He stood up and left the meeting room, walking into the corridor. It was already late at night, but the lights in the Magic Association were still on. Many people were coming and going, seemingly discussing a series of urgent issues such as post-disaster reconstruction and resident resettlement.

"Ah... you're awake." A female member of the Magic Association noticed Xu Mu and immediately walked forward. Her eyes were shining with admiration, as if dotted with little stars.

"President Han Ji and Councillor Zhu Meng are having a meeting in the bell tower. If you need anything, you can go up to find them."

"Well, thank you." Xu Mu nodded slightly to express his thanks, then walked straight towards the gate of the Magic Association.

His first priority was to solve the problem of his rumbling stomach, so it was completely unnecessary to look for Zhu Meng and the others.

Xu Mu was not sure how long he had slept. First, he had a fierce battle with the wolf girl, and then he had a life-and-death battle with the Lord of the Underworld. He estimated that he had slept for at least a month, right?

When he walked out of the gate of the Magic Association and stepped into the bustling street, he saw that the shops on both sides of the street were hung with red lanterns and red couplets, filled with a festive atmosphere.

Since the disastrous rainstorm, the ancient capital has welcomed the season of snowflakes again. The ground is covered with a thick layer of white snow. Children are laughing and playing happily in the snow, forming a warm and playful scene with laughter echoing in the air.

"So the New Year is almost here..." Xu Mu muttered to himself, and suddenly realized something. He found a restaurant that was still open and solved his hunger problem.

After a hearty meal, Xu Mu returned to the Magic Association. He knew that the power of chaos he had displayed during the catastrophe in the ancient capital must be kept secret for the time being and not be easily revealed.

At present, it seems that the most reasonable explanation is to attribute all this to the awakening of totem power.

Oh, this cannot be ordinary totem power, it must be at the level of holy totem.

The power of ordinary totems, like the reference totem thunder leopard, is so powerful that not only others but even Xu Mu himself would not believe it.

(End of this chapter)