In terms of sheer strength, Oliver Sheng at this moment was comparable to an early-stage Great Grandmaster.

But this was just his basic strength. With the addition of blood energy, True Essence, martial arts, and other factors, he couldn't truly match a Great Grandmaster.

Anyone who could break through to the Great Grandmaster level was a genius in martial arts, an outstanding figure.

Upon reaching the Grandmaster realm, one must cultivate the five internal energies. Only when the five energies are perfected can one break through to the Great Grandmaster level.

To reach the peak of the Great Grandmaster realm, one needs to gather the three flowers at the top and direct the five energies towards the origin, only then is there hope to break through to the Martial Saint realm.

In this wilderness, Oliver tested his strength. After the initial joy of breaking through to the Grandmaster realm subsided, he returned to River West County.

In the Grandmaster realm, one could fly through the air. Oliver came and went without a trace.

No one knew he had left the city, no one knew he had returned, and no one knew he had broken through to the Grandmaster realm.

Oliver concealed his aura to the mid-Innate stage to confuse outsiders.

A Grandmaster at eighteen years old would astonish countless people if word got out.

He wasn't yet strong enough to disregard Great Grandmasters, and above Great Grandmasters, there were Martial Saints.

For now, he would lie low; it wasn't yet time to make his presence known to the world.

......

In the Qingyuan Mountains, the fox demon Isla Qin had joined forces with the black wolf demons' king, Black Fiend, and had several confrontations with Mason Wei and Nolan Dan, with neither side able to gain the upper hand.

Black Fiend, the king of the black wolf demons, was a peak-level great demon, with strength equivalent to a human martial artist at the Innate Great Perfection stage, with one foot already in the true demon king realm, possessing formidable power.

Under Isla Qin's manipulation, Black Fiend not only teamed up with her to fight Mason Wei and Nolan Dan but also sent wolf demons out of the Qingyuan Mountains to attack Suiyuan County.

In Suiyuan County, apart from the county town, the wolf demons rampaged through other villages and towns, causing numerous incidents of wolf demons eating people and spilling blood.

The County Magistrate of Suiyuan County reported the demon invasion to the prefecture, requesting military intervention to suppress the demon disaster.

Upon receiving the distress letter from Suiyuan County, Prefecture Commander Victor Cui was immediately summoned by Ding Prefecture's Governor Feng Zhili.

"Commander Cui, there's a demon disaster in Suiyuan County. Take your troops and suppress the demon tribe immediately. We cannot allow the disaster to spread," Governor Feng said sternly.

"The wolf demons from Qingyuan Mountain have come down?" Victor Cui frowned slightly upon hearing this.

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The great demon in Qingyuan Mountain was difficult to deal with even for him. The wolf demons of Qingyuan Mountain rarely came down the mountain.

"The County Magistrate of Suiyuan County sent a distress message, saying that a large number of wolf demons have appeared, attacking villages and preying on the common people," Governor Feng explained.

"Alright, I'll take the troops to check it out."

Victor Cui nodded, then gathered three thousand prefecture soldiers and headed to Suiyuan County.

......

"Damn it, these wolf demons are so rampant, daring to come out of the mountains and attack the common people. Aren't these beasts afraid of our Great Wei army's suppression?" Mason Wei's subordinate, Silver Medal Xu, angrily said after slaying a small demon attacking a village.

"It's all because of that demoness. She's truly a fox spirit, even managing to manipulate that great black wolf demon into sending wolf demons to attack villages and use the common people as blood food."

"Stop complaining and quickly clear out these wolf demons. If things get out of hand, we won't be able to handle the consequences," another Silver Medal said.

They hadn't expected the wolf demon to be so rampant, daring to send small demons down the mountain to attack humans.

Mason Wei's nine Silver Medals continuously patrolled Suiyuan County, slaying wolf demons.

But there were too many wolf demons, and they were too cunning, using diversion tactics expertly, making it impossible to kill them all.

In the Qingyuan Mountains.

"Princess Su, I have followed your orders and sent my subordinates down the mountain. I have also helped you deal with those Demon Slayer Division martial artists and that Taoist."

"Now, it's time for you to fulfill your promise." A burly man in black said, arms crossed.

"Of course, Brother Black Fiend, I will naturally help you break through to the demon king realm."

Isla Qin, no, Isla Su, smiled charmingly, her allure captivating all.

Black Fiend dared not look too much, fearing he would lose his mind and become Isla Su's dog.

"In this jade bottle is a drop of the wolf tribe's demon emperor's essence blood, enough for you to break through to the demon king realm." Isla Su took out a jade bottle and waved it in front of Black Fiend.

Black Fiend's eyes were fixed on the jade bottle in Isla Su's hand, the desire from his bloodline tempting him like a deadly poison.

"Do you want it?" Isla Su smiled seductively.

Black Fiend nodded like a husky, eyes full of desire.

"You can have it, but I have one condition," Isla Su said.

"Please, Princess, tell me."

At this moment, even if Isla Su asked him to kill the two human experts in the mountain alone, he wouldn't hesitate.

"I want you to kill that annoying Taoist and that damned martial artist after you break through to the demon king realm," Isla Su said.

"I obey Princess's command. Black Fiend will follow Princess's orders," Black Fiend said, eyes burning with determination.

Once he obtained the wolf tribe's demon emperor's essence blood, his bloodline would transform, and he could easily break through to the demon king realm. Even reaching the great demon king realm wouldn't be impossible.

"Good, remember your promise. Here, take it." Isla Su threw the jade bottle to Black Fiend.

It was just a drop of demon emperor's essence blood. Cultivating a demon king to help her fight was worth it.

"Princess, excuse me. Black Fiend will go into seclusion to break through to the demon king realm and then kill those two human experts for you."

Black Fiend took the jade bottle and excitedly went into seclusion.

In the cave, Black Fiend sat cross-legged, his expression excited.

"Heh, once I break through to the demon king realm, none of you will escape. I wonder what the fox tribe princess tastes like. This king needs a wife."

Black Fiend's expression was wild, his ambition evident. Without hesitation, he opened the jade bottle, and a drop of bright red essence blood, like a great sun, filled with powerful essence, floated in the air.

Staring at the drop of demon emperor's essence blood, Black Fiend swallowed it without hesitation.

The immense power spread within him, and his wolf demon bloodline continuously purified and evolved.

Two days later, Black Fiend broke through to the demon king realm, equivalent to the human Grandmaster realm.

After breaking through, Black Fiend emerged from seclusion and came before Isla Su.

Isla Su glanced at Black Fiend, seeing his aggressive expression, and smiled faintly.

"You don't think that breaking through to the demon king realm means you can act without restraint, do you?"

"I don't understand what Princess Su means," Black Fiend said with a charming smile.

The silver bell on Isla Su's wrist rang, producing a crisp sound.

"Ah..."

Black Fiend suddenly screamed, feeling a heart-wrenching pain in his chest as if part of his heart had been torn out.

"Damn it, what did you do to me?" Black Fiend looked at Isla Su furiously.

"Have you heard of Miao Territory? There's a kind of Heart-Eating Gu there that specifically gnaws at the heart. As long as I shake this bell, it will take a bite until it devours your heart completely," Isla Su said, her pure and charming face betraying no hint of her true nature.

"Damn it, you put a Heart-Eating Gu in the demon emperor's essence blood?" Black Fiend said, trying to snatch the silver bell from Isla Su's hand.

"Ding!"

The bell rang, and Black Fiend felt as if thousands of ants were gnawing at his heart, rendering him completely powerless.

"Stop, Princess, please stop. I dare not oppose you. Please spare me," Black Fiend begged in pain.

He never expected that his greed for the demon emperor's essence blood would lead him into a trap.

Isla Su stopped, speaking coldly, "Stupid wolf, put away your little schemes and obey me. You can live, otherwise, I don't mind turning you into food for the Gu."

"I, Little Wolf, am willing to serve Princess Su without any disobedience," Black Fiend said fearfully.

To think that he, the king of the black wolf tribe, a great demon at the demon king realm, would become someone else's dog due to a moment of carelessness.

"Very well, now, send all your wolf demons to collect human essence blood for me. You also need to kill those two human experts and bring their bodies to me," Isla Su said coldly.

"Yes, Princess Su." Black Fiend quickly turned and left.