Reincarnated as the Demon King's Son

"Your Royal Highness, why do you insist on following this boy? You realize that there's nothing we can do for him in this treasure hunt," Frey said as they were floating with an invisibility spell above Mount Fargon.

Velika pouted. "We've been following him since he was in the fort. What's wrong with following him until here?"

Frey sighed. "I am sure His Majesty, your father, misses you. Why don't we return to the capital."

"No. I want to see his journey with my own eyes."

Frey rubbed his forehead. "The guardians have been watching us. It won't be long before they do something."

"But I want to keep watching him."

"All he does is kill monsters and have seggs with his women. What is there to watch?"

Velika stayed silent as her cheeks became red. "So what if I want to watch him have seggs?"

...

The gigantic creature burst out of the floor. Its exoskeletons grinding against the floor.

"It's you again." Aldred stared at the beast as its claws slammed the ground.

Aldred took a deep breath again to regain his stamina. Suddenly, a beam of golden light came towards his back. It restored his stamina, and all of his exhaustion disappeared.

"Thank you, Mira."

Mira smiled before she fell unconscious again. That spell took everything of her to cast.

Aldred was still in his demon form, and then he activated his Golden Battle Gear. The set of armor enveloped him, and blue crystals dotted the surface. Blue mists came out of the crystals before the helmet covered his face with a crystal of the same color.

Black wings came out of his back, and his runic spear glowed with blue lightning flashed around the spearhead.

His stepped forward. Lightning crackled under his feet. Pointing at the beast with his spear, Aldred showed no fear under the gigantic behemoth.

"You will die and become my servant. Be grateful that you have the chance to serve me, insect."

The creature seemed to understand his meaning. It trembled in rage, and then roared at him. With a powerful sweep, Xer Xai created a large gash on the floor, but Aldred was nowhere to be seen.

It looked around, then looked up to notice that Aldred was falling from the sky, roaring with a spear in hand.

His body flashed, and he slammed onto Xer Xai's head, hammering him to the ground with a spear stuck in his head.

"Die!" Aldred rotated the spear, and sent out lightning through the creature.

The creature roared and swiped at him.

Aldred snorted and met the claws with his spear.

Clang! Boom!

The clash threw Aldred dozens of meters away, but the beast stood in place.

"Using your giant body to fight me? You think I cannot do that as well?" Aldred's body slowly ballooned into a giant. Now he was of the same size as the beast. The spears, armors, and his horns were of gigantic size as well.

The creature rushed at him, and Aldred did the same. He raised his spear and stabbed through the creature's stomach. Lightning crackled, and shot inside, creating a large wound.

The creature roared and bit on his shoulder. Aldred gritted his teeth and punched the creature with his other hand.

The beast retaliated by stabbing both claws into his chest. The claws penetrated through the armor.

They both fought for hours, refusing to back down. Each blow was gigantic and powerful, shattering the floor, and shaking the sky.

It was the battle of giants.

No wonder Thignia Empire couldn't stop this beast. Its claws were so powerful that it could even penetrated a battle gear. The chest plate of this armor was the thickest part. For the beast to destroy it was nothing more than spectacular.

Aldred admitted its strength. But he grinned behind the crystal helmet.

Suddenly, two others giant wearing the same armor as him, and using the same spear as him, appeared beside the creature.

They were his blood clones.

The two of them struck the creature's abdomen, and blasted it with lightning. The creature roared and let go of his shoulder before falling to the ground.

Aldred morphed back into his normal form. His feet wobbled and he let go of the spear before falling right in front of the beast.

He was too exhausted. The battle sap all of his energy, and he couldn't move.

"Congratulation."

Yellow lights engulfed them, and restored their energy. This one seemed to be more potent than Mira's spell. They were lifted on their feet, and Stella gracefully landed on the floor.

"You have passed the last test. This is your reward." She swung her staff at them, and all the stars in the night sky shot a powerful beam that engulfed their bodies.

[You have received Extreme Endurance. You are said to outlast any man in battle]

[You have received Empowering Massacre. You received temporary buffs for every enemy you kill]

Then suddenly, some sort of device that looked like a golden clock appeared.

"This is the astrolabe. It will help you in finding the next device to unlock the treasure."

The astrolabe spun around and floated in his hand.

Aldred stretched out his palm, and the astrolabe entered his body. "Thank you. But I promised my friend an astrolabe as well. Can you give me another one?"

Maverick was grateful that Aldred remembered his promise. He was a little worried that Aldred would leave him with nothing. Seemed like he wasn't wrong about the boy in the slightest. A loyal and grateful man who never break his promise.

Stella nodded and summoned another astrolabe that entered Maverick's body.

"You can summon the astrolabe however you will."

Aldred tried to make the astrolabe appear, and it did, floating right in front of him, radiating white, gold, and other color of mysterious light.

He let the astrolabe entered his body again. "How do we get down?"

"You haven't receive your last reward."

"Oh, there's more?" Aldred asked. "What is it?"

Stella stepped forward and hugged him. "Me!"