Reincarnated as the Demon King's Son

Aldred and the viking stared at each other. Both of them were in a stand-off staring contest from a distance. Aldred thought he would fight them to activate the last 12 crystals, but the other group started fighting each other, and it took them hours to activate the crystals.

All the crystals glowed and they were making weird sounds. It wasn't a magical-type sound, but a machine-like sound.

Suddenly, the crystals on the ceiling shattered. And a person in a dark robe slowly descended from above. His clothes fluttered, and softly, his bare feet landed on the cold hard ground.

Aldred's system did not detect any levels from this person, but the aura he exuded was powerful. He could see it with his godly eyes.

"This is not something we can fight alone," Aldred said. The viking seemed to notice that as well, as they warily stared at the man in the robe.

Aldred looked around and noticed there were more people coming in from the tunnels. The total was around 120 people, but Aldred did not have any confidence in them.

He frowned. It was like the mountain intentionally cut their numbers in half.

The man in robe raised his right hand. It was a weird hand, made out of chaotic red energy. His whole body flickered with a golden light that put heavy pressure on the room.

And then the man pressed his palm down in a majestic manner.

"Siphon Soul."

Suddenly, white energy was pulled out of the people's bodies, and they fell by the dozens. They were panicking and quickly cast magic shields.

"Cast shield!"

Sophia and Mira frowned and waved their hands, creating a bubble of protective shield around them. Maverick threw a parchment that burned in the air, and another layer of transparent energy enveloped them.

"Did he just suck their soul?" Aldred stared at the man in the robe who absorbed all the white energy that came at him.

"What a terrifying power."

There was a whirling sound, and Aldred noticed white energy was spinning below his feet.

'Crap!' He dodged to the side, and the white energy burst upward.

He heard screams from other places and noticed that a lot of people were struck by the spell.

Aldred narrowed his eyes. "We cannot stay like this. We have to attack!"

He was about to charge forward, but the vikings beat him to it. They threw ropes at the man in the robe, but transparent energy burned the rope all the way.

The vikings did not give up and attacked with their axe. The large viking was at the lead. He raised his large axe and slammed down. A small shield suddenly appeared on top of the robed man, deflecting the axe.

"Help him!"

Aldred and all the other groups came charging. They had to work together to defeat the mysterious magician or else they would die. He summoned his undead.

Nicky led the 50 Gold Rank giant snow wolves, while Crook and Brook charged ahead of the 50 Gold Rank snow apes. That was already 100 Gold Rank, and the Elite Gold Rank: Milet, Teethless, and Will were attacking as well.

The people were more shocked at his undead collection than the magicians, but they were mistaken because the magician is a lot more powerful. A burst of sand came from the ground, and it morphed into royal sand soldiers with golden armor and spear.

It rushed against the wave of adventurers and stabbed. Their shield cracked and shattered before they were thrown a dozen meters away.

"Destroy them!"

They attacked the sand soldiers, blasting them with spells, and weapons. Aldred's undead were on a rampage; stomping, biting, pouncing, and clawing, they destroyed the sand soldiers one by one.

The magician flinched, but not out of fear, it was like saying; this was the time to show my real power.

A powerful aura blasted from his person, pushing everyone by a few steps. And then he raised both palms menacingly as rock pillars raised from below, shooting upward, and slamming their jaws.

His palm went down, and a powerful stream of water came from above like a tsunami.

He spun. A sharp powerful typhoon appeared and created chaos inside the cave. One man was lifted by the wind, he screamed, kicked, and punched in the air, but then was shredded to pieces.

And then flames burst everywhere. Spinning along with the wind, burning anything and anyone it touches.

Some people wanted to run, but the tunnels were closed using the earth elements. Lightning sparked in the wind, and like a hammer of god, it struck down at the people below.

"AHH!"

Aldred gritted his teeth. He absorbed the fire with his spells and stared at the mysterious magician. 'What power is this? This magician mastered all the elements!"

The large viking roared and swung his axe. Before it could land, the magicians suddenly became two. He attacked one, but his axe went through the body like the magician was a mere illusion.

"Hold that guy for me!" Aldred rushed ahead and swung his sword. His movement was quick and precise. The blade went for the neck.

The magician raised his hand and blocked the sword. Aldred noticed that there was a small shield made out of runes on his palm.

"It's not enough to stop me!" Aldred blasted the man with his flame jet, but a dark-purple circle appeared in front of the jet, and the flame entered some kind of dark dimension before it was never to be seen again.

"Space manipulation?" The people widened their eyes.

Not only did the magician control fire, wind, water, and earth, but he also controlled space?

To their shock, the mysterious magician did not stop there. He palmed the air slightly, and time slowed down. They all could see in real-time, but their body moved like they were in slow motion.

The mysterious magician approached Aldred. He snapped his fingers, and the space was bent, preventing anyone to see both of them. The magician then lifted his hood, revealing a beautiful woman with black hair, and green eyes.

"Sister Dina?" Aldred couldn't believe his eyes. "Is this an illusion? Are you trying to defeat me using incest? Let me tell you that won't work on me! I have a powerful will!"

Dina giggled. "You're still the silly little Aldred I know."

"It's really you, big sister?"

"Of course it is me." She snapped her fingers again, and time literally stopped in the cave.

"Why are you here? How could you be here?"

Dina pouted. "Why? Do you not want me to be here?"

"N—no, that's not what I meant."

Dina hugged him and smiled. "I am joking." She looked at him and caressed his face. "Look at you all grown up now."

"Sister, I am still 10 years old. I don't think I am grown yet."

She pulled him into her embrace. His face was stuffed with her big breast who was hidden under the baggy robe. "I miss you so much! I can finally meet you after sneaking out from mom."

Aldred noticed a tear in her eyes. He hugged her back. "I miss you too, sister. I miss you a lot."

Dina giggled. "You little baby boy. Still cute as ever." She pinched his cheeks. "If only I can take you back. I miss spending time with you in bed, reading books, and enjoying sweets together."

"I miss that too, sister. I miss It a lot. But I have to grow stronger am I?"

Dina sighed. "At first, we simply want to unravel your potential, but now you getting stronger is a necessity."

"Why?"

"Dad didn't want us to tell you this, but he's actually in a different dimension."

"Dimension? Not universe?"

"Yes. The fourth dimension specifically. Mother and I don't know what he's doing there, but I believe he's fighting against something powerful. Father tried so hard to hide this fact from us, but mother unlocked the mystery little by little through her power."

Aldred frowned. Dina had never used the word 'powerful' before, so this might be serious. "Is he going there alone?"

Dina shook her head. "He came there along with the thousand gods."

"That's serious."

"I know." Dina felt sad. She preferred Aldred just to stay in the castle without going through these dangerous adventures.

If only she could replace him, she would. Sadly, she did not have his potential. Not even in the slightest. In the future, Aldred would shake the multiverse and every dimension in existence.

As Aldred was thinking, he heard a sniffing sound and noticed Dina was crying.

"Sister, why are you crying?"

Dina hugged him. "I feel sorry for you. I don't want you to go through all these."

"I am fine, sister. In fact, I enjoy it. Look at how many friends I met during the journey. They have been so good to me."

Dina wiped her tears. "I know. We've been watching you."

"…"

"Right… you've been watching me." Aldred scratched his head.

"I believe you have watched me eat good food at night as well."

Dina giggled. "Yes. Now you can shape shift, right? You look as handsome as dad in your adult form."

'Oh shit, she saw that? Damn, how can I act like an innocent baby from now on?'

Dina held his cheeks. "You look so manly, Aldred. It's so sad to see you're not that little baby boy anymore."

'No, sister. In front of you, I am still that little baby boy! So love me again!'

"But I love you all the same." Dina hugged him. "No matter how you changed, you will always have a place in my heart."

She released the hug and kissed him on the lips. "I will go now."