"You!" Asos shouted, full of rage and struggling. The chains made loud noises, but they wouldn't come loose.

Boom!

The black bone hit, and the black scales broke. Asos's back was covered in blood, and his huge body fell heavily to the ground.

This attack did over 700,000 damage.

"His defense is that high?" Constantine was surprised. He had thought it would do at least a million damage.

"Lowlife, have the guts to let me go and fight you face to face!" Asos looked angry, struggling hard, but the few unimpressive jade pillars seemed rooted to the ground. They wouldn't come loose.

"Stop talking. End this fast!" George said coldly.

This black dragon was too strong. He was worried something else might happen.

"Yes." The others said, and immediately launched their strongest attacks.

Magic flew, and cold light flashed.

Asos's huge body was covered in strong energy. His HP dropped quickly.

The Golden Flame Dragon also acted fast. He used Dragon Language Magic, and the sky was filled with fire.

Roar!

The chains shook. Asos roared in anger, but he was still tied up. He could only take the hits.

"I never expected I, Asos, would fall here, at the hands of a few insects. Even if I die, I'll make you all pay!"

Asos stopped struggling. His scales broke, and he was covered in blood. Even one of his big dragon eyes was pierced. Blood poured out, and the other eye stared fiercely at George.

"Hmph, dying and still talking big." Constantine said, not caring. He flew into the air, spun around, and swung the black bone down hard.

"Be careful! It's burning its Dragon's Core Spirit!" The Golden Flame Dragon noticed something wrong and quickly warned them.

Dragon's Core Spirit was the life force of a dragon. When it burned, the power was terrifying.

The chains shook wildly, but they still held Asos tight.

At that moment, a huge black dragon shadow flew out from Asos. Its wings flapped, and it knocked Constantine away.

"Bad!"

Elise looked scared. The shadow was aiming for George.

"Master!"

She rushed to George, not thinking.

But the shadow was too fast. It moved in a flash and was already above George.

"Die!"

The black dragon shadow roared, and a huge claw came down. It covered the sky, and George couldn't escape.

He tried to move, but he couldn't. He just watched the big claw come down.

George felt a huge force hit him. His body felt like it was being torn apart. He spat blood and flew back, falling heavily to the ground.

On the other side, Elise looked pale, and blood came from her mouth.

It was the Life Link. She took 50% of the damage George had taken.

Thankfully, the Life Link saved his life. Otherwise, that attack would have killed him.

Even so, George was badly hurt.

"Hey, he's not dead?" The black dragon shadow was surprised. It moved again, ready to attack.

"Stop!"

Constantine and the others were scared.

"Asos, let go of the master. We'll let you leave!" Elise begged. George couldn't survive that attack.

The wind blew, and dark shadows covered everything.

A huge claw stopped above George's head. The pressure was terrifying. His soul shivered, but he stood firm, his eyes full of defiance.

The big claw did not come down.

"Interesting," the black dragon Asos said in a mocking tone.

Boom!

Constantine rushed forward and knocked the shadow away. Elise and the others didn't hesitate. They stood in front of George, glaring at Asos. Their bodies radiated strong magical power.

"Wait," George stopped them from attacking. He looked at the black dragon shadow and asked, "You want me to let you go?"

He wasn't going to let this guy go.

Asos had killed the mother of the Golden Flame Dragon. Maybe the dragon had great potential, but George didn't care.

"Ha," Asos laughed. He looked at the angry Golden Flame Dragon and said, "I've already burned my Dragon's Core Spirit. I'm going to die anyway. And you think I'd beg a lowly human like you for mercy?"

"Master, he's right. He's already dead," the Golden Flame Dragon said coldly.

Dragon's Core Spirit was the life force of a dragon. Burning it meant death.

Of course, the Golden Flame Dragon was an exception. His body was destroyed, but with George's help, he had awakened the Eternal Dragon Essence talent. As long as he had that, he was immortal.

Even so, he wouldn't burn his Dragon's Core Spirit. If he did, even with the talent, he would lose a lot of power.

George became more confused. He looked at the fading black dragon shadow and asked, "I don't think you'd be so kind. So, what do you want from me?"

"Hmph, you're thinking too much. I'm not letting you go just because I saw a chance. Maybe you can shake up the demon race."

Asos said in a deep tone. He had been trapped by Demon King Blake for thousands of years, and he hated the demon race with all his heart. He saw a chance to destroy them in George.

"Since you're going to grow, I'll help you one more time," Asos said with a smile, though it looked evil.

George had a bad feeling. He took a step back. The black dragon shadow flashed and suddenly appeared in front of him. Elise and the others couldn't react.

The shadow changed form. It entered his forehead, turning into a small black six-pointed star. Then it disappeared.

George felt something change in his aura. But it was so subtle, he couldn't tell unless he was paying close attention.

The shadow vanished. Asos was still tied up, lying on the ground, barely alive.

"What did you do to me?" George stared at him coldly.

Asos smiled calmly and said, "I just wanted to make sure your determination to fight the demon race was strong enough. I gave you a mark."

He looked at the powerful pets by George's side and said, "The Oathweaver class really exists. I hope you can survive the hunt from all the races."

The Oathweaver? George was stunned. What was that class? What did it have to do with him?

"By the way," before George could ask, Asos said, "The mark I just gave you is a demon race kill mark. It's on people who could threaten the demon race. You're on it. Hope you can handle it."

"You're asking for death!" Constantine was furious. He pointed his bone at Asos and said, "If you help the master remove this mark, I'll give you a quick death."

"Haha!" Asos laughed, "The only way to remove a demon mark is to die. Otherwise, it will stay with you for life."

"Damn it!" Constantine roared, swinging his huge bone down hard at Asos's head.

Boom!

A loud explosion followed, along with the sound of bone breaking. Asos fell into a pool of blood, his breath weak and blood flowing from his mouth. But he still had a mocking smile on his face as he whispered, "One more warning, the Underworld Realm is special. Other demon race strong ones can't enter, but Blake can. This place was created by him to trap the Felborn. You've been exposed. You'd better leave quickly."

George was angry. He hated being tricked.

"Kill him," he said coldly, no longer asking questions.

Constantine and the Golden Flame Dragon both attacked at once.

The black bone roared, and dragon fire filled the air.

Another explosion. The dragon fire roared. Asos was already badly hurt, and this hit ended his life.

[Killed Black Dragon Asos (Boss), Experience +1.3 million, Points +100,000]

[Dropped Materials: Obsidian Scale x44, Dragonstone x1, Nocturne's Blood x1, Dark Dragon's Core Spirit x1, Dark Dragon Wings x2, Soulshackle x5, Underworld Key x1...]

[Dropped Equipment: Black Dragon Armor (Starlight Rank), Shadow Cloak (Starlight Rank)]

The prompt flashed.

The Black Dragon Asos was dead. The dropped items and materials were all SSS tier. And two Starlight Rank equipment pieces.

George checked them one by one.

Obsidian Scale could be used to make weapons and gear. Dragonstone was dark red, with flames moving inside. It could be used to make rare potions and to draw magic arrays.

Nocturne's Blood and the Dark Dragon's Core Spirit were the essence of dragons, and their uses were even wider.

Ebonwings could be used to make weapons, especially the wings of Black Dragon strong ones, which were very rare.

But the most surprising thing for George were the last two items: five thick red chains and a small black token.

[Soulshackle: SSS tier, full of strong power. It can trap souls. Only gods can break free.]

This item was so strong it could trap souls below god-level. This item was too powerful.

Thankfully, they had the Soulshackle, or they wouldn't have been able to fight Asos at all.

[Underworld Key: Special item. After refining, you can fully control the Underworld. Refine it? Yes or No?]

This was a tool to control the Underworld.

"Refine it!" George only hesitated for a moment before choosing to refine it.

The small token directly entered his body.

George felt a strange feeling in his mind. It was like the whole Underworld was now under his control.

All the strong monsters, the fighting students, and the complex maze of the Underworld.

But one place was still covered in fog. It was the underground prison they were in now.

It seemed like there was still a secret there.

"Master, can I have the Dragonstone and Nocturne's Blood?" the Golden Flame Dragon stared at George's hands and asked. "I feel if I refine and absorb them, I can rebuild my body."

"Of course," George said without hesitation. He handed over the Dragonstone and Nocturne's Blood to the Golden Flame Dragon.

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