In the Underworld, Joelson's consciousness was no longer restricted by his body, and he could fly at a very fast speed.

Below him, countless undead creatures on the ground continued to move forward as if they were on a pilgrimage.

Joelson saw a particularly tall skeleton soldier. Its strength was between rank 6 and rank 7, and the soul flames in its skull were several times more than that of ordinary skeleton soldiers.

This should be the leader of the skeleton soldiers Fredrick had mentioned.

Behind the leader of the skeleton soldiers were more than a dozen ordinary skeleton soldiers.

Joelson's consciousness descended.

The leader of the skeleton soldiers stopped, and the soul flame in its skull flickered continuously.

Joelson felt a strong resistance. It was the consciousness of the leader of the skeleton soldiers resisting him.

However, this resistance was not too strong for Joelson. He spent a little effort to subdue the skeleton soldier leader just like the previous skeleton soldier.

A weak connection was formed.

Joelson felt that the dozen or so ordinary skeleton soldiers behind the skeleton soldiers also showed a sense of subservience to him.

He suddenly had an epiphany in his heart.

If he could subdue a powerful undead king, wouldn't that be equivalent to having a huge undead army?

No wonder the undead mages were so powerful.

That was how the sea of people tactic came about.

He felt that the leader of the skeleton soldiers was not his limit either. This time, Joelson did not cut off the connection with it. Instead, he temporarily left it aside and continued to move forward.

After that, he met a few of the leaders of the skeleton soldiers. He established a connection with them, but he never found an undead creature that he was truly satisfied with.

As for the soul fluctuation that Fredrick said was particularly compatible, he had never felt it before.

His spiritual power already had a faint sense of fatigue. This was a sign that his summoned creature had reached its limit.

Joelson considered returning.

At this moment, a battle between undead creatures not far away caught his attention.

A powerful undead ghoul.

Its face was withered and hideous. Its body, which was nearly ten feet tall, was wrapped in thick black gas.

A tier-9 ghoul.

It was also leading countless low-level undead behind it. It was very dense. At a glance, there were at least tens of thousands of them.

The undead corpse demon's opponent seemed to be even stronger than it.

It was a knight riding a warhorse.

The skeletal warhorse was tall and ferocious. Black Flames were burning on its bones and four hooves.

The knight was wearing black heavy armor that was covered in rust. Its entire body was covered, and its appearance could not be seen clearly. Only a pair of eyes that were emitting a strange red light could be seen through the mask.

The black-armored knight rode on the undead skeletal horse. He held a heavy knight's spear in his hand as he charged recklessly in the midst of the undead horde.

Every time the black-armored knight charged, a large number of low-level undead skeletons would be trampled by the skeletal warhorses and the knight's spear. They would be crushed into pieces.

Green soul flames splashed everywhere. Many of the skeleton soldiers on the battlefield received a boost during this process. They grew into skeletons that were one level higher and continued to fight.

The undead ghoul roared, and its stiff body jumped up high, blocking the black-armored knight's wanton charge.

Countless skeleton soldiers surged up like a tide.

The situation was tilted in the direction that was disadvantageous to the black-armored knight.

Joelson hovered in the air, quietly watching.

The tier 9 undead demon and the black-armored knight seemed to have noticed his special existence.

They raised their heads to look at him more than once.

The black armored knight's gaze was indifferent, while the undead ghoul was filled with fear and hostility towards Joelson.

With a thought, Joelson moved.

Dozens of skeleton leaders that had surrendered along the way, as well as the skeleton lords, moved at the same time.

When they heard Joelson's call, they led their subordinates and rushed in this direction.

The black armored knight gradually showed signs of failing.

The low-level skeleton soldiers had consumed a lot of its energy, and the corpse demon was not much weaker than it.

It had already been hit by the undead corpse demon several times.

A slightly dented palm print appeared on the chest of the black heavy armor.

Joelson suddenly dived down and drilled into the corpse demon's head, trying to subdue its consciousness.

This was the most intense resistance that Joelson had encountered since he arrived in the Underworld.

A brutal and cruel consciousness was engaged in a fierce battle with him, and he kept retreating.

But his goal was never to subdue the undead.

Because of the disturbance of his consciousness, the ghoul had to devote more than half of his spiritual power to fight him.

The black armored knight seized the opportunity and saw it. He drew a black track with his lance and stabbed into the heart of the ghoul, stirring it vigorously.

The ghoul roared angrily.

The situation instantly reversed.

The ghoul kept retreating and was pierced by the black-armored knight one hole after another.

Soon, the skeleton soldiers summoned by Joelson arrived and fought with the ghoul's skeleton soldiers.

The black-armored knight lowered his body slightly. The undead skeletal horse spat out black flames from its mouth and nose. Its hooves dug into the ground, ready to charge at any time.

The two seemed to be a single entity, shooting out like a black arrow.

Joelson instantly left the body of the undead corpse demon.

A knight's spear wrapped in black flames stabbed into the corpse demon's head, shattering it into pieces.

Intense green flames floated out, and the black-armored knight grabbed it in his hand, bringing it close to his mouth and absorbing it completely.

The black light on its body seemed to be stronger.

All the skeleton soldiers stopped fighting.

The undead demon was dead, and a new leader was born.

In the Underworld, there was no so-called loyalty and betrayal. Strength was everything.

The black armored knight rode on his warhorse and jumped onto the bone mountain. His scarlet eyes looked directly at Joelson.

Joelson seemed to understand the meaning of this gaze and descended.

It was very smooth. Without any resistance, the magical connection was formed.

He helped the black-armored knight win the battle and gain the other party's approval.

Crack crack crack!

Hades jumped back to Joelson's side and hid behind him in panic.

The figure of the ape spirit appeared in the gray fog. The Necromancer was riding on the head of one of the ape spirits and quickly chased after him.

"Someone's here?!"

The Necromancer's face revealed a wary expression the moment he saw Joelson.

He did not expect the undead dragon to have a master.

It seemed like he had met someone who was traveling with him.

The Necromancer was jealous. His eyes were filled with greed and unwillingness as he looked at the undead dragon.

Suddenly, he noticed that Joelson had been closing his eyes tightly as if he was meditating.

His eyes gradually lit up.

After killing this idiot, the undead dragon would be mine, hahaha!

"Master! Master!"

Frederick called out anxiously in Joelson's ear.

He did not expect that it would take so long for Joelson to complete the first step of the undead summoning.

Normally, it would only take a few minutes.

Would it be so difficult to subdue a tier 6 or 7 skull?