Riser Phenex? DXD SI. Multicross?

Author: KAIOSHIN

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The night advanced, casting the Phenex Palace in soft and mysterious shadows. Riser, in his room, was immersed in thoughts, absorbing the recent revelations about his destiny. Meanwhile, Tsunade rested by his side, still enveloped in the newly transferred demonic power.

The night breeze whispered through the partially open windows, and the silence was interrupted only by Tsunade's soft snoring and Riser's tumultuous dreams. A dream where a "magical girl" woman, for some reason, tried to turn him into a magical boy. This same magical girl who would shake from heaven to hell. All for her So-Chan.

The Phenex Palace was shrouded in a deep quietude, broken only by Tsunade's soft snoring as she lay deeply asleep in Riser's bed. Shadows danced on the walls, creating a play of light and darkness in the room.

As time passed, the night and quietude were slowly and gradually replaced by the underworld morning. Although the word "morning" might not be accurate, considering the underworld lacks a sun; everything is artificial. All to ensure that reincarnated demons can have a greater affinity with the demons in the underworld.

The sun rose radiantly the next day, illuminating Riser's room through the curtains. He stretched in bed, feeling full of energy after absorbing Tsunade's power.

Rrrrr...

Riser Phenex woke up the next morning, feeling refreshed after a deep night's sleep. The sun began to illuminate his room, bringing a soft golden light that contrasted with the red curtains. He stretched and got out of bed, preparing to face a new day.

Opening the curtains, Riser was greeted by a stunning view of the Phenex Palace garden. Flowers bloomed in an explosion of colors, and birds sang cheerful melodies. The fresh morning aroma filled the room, creating a comforting atmosphere.

"Let's set this fire ablaze!" he exclaimed, jumping out of bed excitedly.

Tsunade, hearing Riser's noise, couldn't help but wake up. She had just risen and started her usual maid activities. Meanwhile, Riser looked at himself in the mirror. He felt his power had grown. He also sensed that his strength had increased several folds. Almost every cell in his body had been remodeled.

He finally realized that he is a demon, the moment his power exceeded the high-class. A being of demonic energy. As his power increased, his body reshaped to fit the power he possessed.

[TEMPLATE!]

[Sabô - 80%]

[ACE - 75%]

[Feitan Portor - 95%]

[Lucifer MorningStar – 6.3%]

[Batman – DC Comics New 52 - 87%]

"tsk! Damn Batman. I have to practice martial arts to advance in his Template! Anyway, if he keeps using the Fire, the Ace, Sabo, Feitan Portor templates. Maybe he should be able to finish the Feitan Portor."

"Riser-Sama. Your father is waiting for your training. I recommend going to have your breakfast."

"Thank you. I'm on my way. Tsu-chan," said Riser.

Riser quickly dressed and went downstairs, skipping two steps at a time, hungry. In the kitchen, he filled a plate with pancakes, bacon, and scrambled eggs. He swallowed the food at a record speed, barely chewing.

"I need fuel to feed these flames!" he thought.

"Riser, your older brother will take care of your training. Today, he will show everything about Phenex's fire and wind magic. Fortunately, today you will also learn how to make Phenex tears."

"Ruval, take care of your younger brother. Teach him well; he will really need it," said Razer Phenex to his eldest son.

Ruval Phenex nodded in agreement, displaying a confident smile. He was an older demon, with an imposing appearance and a powerful aura. His blond hair shone, reflecting the Phenex lineage.

"Let's go, Riser. Let's put this into action." Ruval led his brother to a lake, and Riser felt that this should be a bonding moment between brothers. But for some reason, he felt like Itachi, going along with his father to learn the Fireball Jutsu.

"First, feel the fire within you. Focus on it as if it were an extension of yourself," instructed Ruval, demonstrating impressive control over the flames. Riser, following the guidance of his older brother, closed his eyes and began to channel his demonic energy.

Zzzsh...

A small flame danced in Riser's hands, growing gradually as he fed it with his energy. The fire took shape, responding to Riser's precise control. He decided to try to finalize his [Feitan Portor] power. Adding Nen as well, he wanted to use an attack similar to a sun [Rising Sun].

Thanks to the Archmage, the combination of such a spell even made it docile and hovered in the palm of his hand. A small sun, he could name the spell Cruel Sun, but it would be a blatant copy of a move. So he just extended his hand casually.

Zoooom! Whoooosh!

The energy destruction ball emanated from his hand! And it was launched into the lake at high speed. Ruval, seeing the energy, tried to say something and intervene; he imagined that his brother would only burn a bit of the water's surface. But this energy radiated heat almost wanting to evaporate everything. Even Ruval felt the heat. Even though he was Phenex, he couldn't withstand the heat of the Sun.

BOOOOOOOOOOOOOOOOOOOOOM!

The explosion reverberated and recoiled; the lake bottom melted like liquid rock; the once beautiful and lush lake disappeared suddenly, as if it had never been there. And at the same moment, it began to rain. Almost as if trying to fill the lake again. But upon touching the ground, the rain evaporated.

Riser turned around with a smile on his face. Ruval had his eyebrow twitching. Now he understood what his father meant. If he loosens the training, his younger brother will surpass him. Ruval opened a smile for his brother.

Suddenly, he felt like patting him on the head. Riser seemed so "innocent" about what he had done. ["This was the lake Mom asked Dad to make. I don't want to know what she'll do if she sees it destroyed."] Ruval thought, already imagining that he would be in trouble.

"Riser, let's go to a place where we can unleash more power. Especially since this is the region where our mother strolls. She will be very angry to see the destruction."

"M-mom, hmm." Riser thought of his mother, with flames coming out of his mouth, and suddenly he felt cold for some reason. He had never seen his mother angry. Quickly, Riser turned around and launched a giant water ball before Ruval could say anything. A Phenex magic circle appeared and quickly.

Whoosh!

Shoooooosh!

"Let's go, brother."

"All right." Ruval affirmed, stopping the pats and teleporting Riser and him to another location.

The place he was teleported to, the ground seemed heavily magically reinforced. It looked like a large coliseum arena. The walls were translucent barriers. All to prevent attacks from leaving this area.

"All right, Riser. Let's begin." And he continued to show all the moves that the Phenex could make. After all, he was teaching how to use demonic magic. Ruval did not expect that for some reason, his little brother only needed to see the launch of the spell. Whether it was controlling the wind to create small tornadoes, as well as creating flames that would devastate a city.

Riser, with his Archmage Essence, not only learned the intricate form of the magic circle when casting the spell. But also how to enhance and intensify it to an unprecedented level.

(A/N: No chapter tomorrow. Tomorrow I will go to my mother's house and will probably spend the whole day there.)