Riser Phenex? DXD SI. Multicross?

(Passing 1 year*) (Some months later) – Riser 7 years

I continued my training routine for the rest of the year, Rumix helped with body training, while Ruval provided combat experience. The progress I was making was consistent, meaning my growth was constant, but now in the Ultimate class, it was more challenging to advance to the next stage.

Later, I found out that my father's relationship with my mother had taken a turn. It was my father who came up with the idea of starting heavier training. He believed it would help me more. My mother was against it, considering my age and how tough and rigorous she is during her training sessions. I imagine my father must have been sleeping on the couch for the past few weeks.

Now, I am 7 years old. After the party at the Sitri residence, I became much closer to the Pillar houses. Even though Serafall tried to keep me away from Sona, it only strengthened the bond. Sona proclaimed me her rival, Rias wants to defeat me in a Rating game to get my attention.

So, I thought about building armor, which sparked Seekvaira's interest since she's a big fan of Gundal. And now, I had plenty of knowledge from her [Tony Stark] template. With Latia, she wanted to get closer to me, both to dominate the underworld business and to plan how to remove her cousin as the clan heir.

Then came Sona's party, the announcement of Sitri's Heiress, as she had turned 3 years old. Of course, I was there. I felt much more comfortable than before, even though my manly pride had been wounded by Serafall.

Serafall was an enigma to me. After the day she teased me at the Pajama party, she started acting much kinder. Maybe she stopped being malicious towards me. I'm not stronger than her, so I can't really do anything except play along with her pranks.

In these months, I received some good letters.

[Templates*] – (Update, now templates can be chosen whether they will be assimilated or summoned.)

[Natsu Dragneel – Fairy Tail] (Fou - Cath Palug - Fate/Grand Order)

[Sho Kusakabe – Fire Force] (Grimoire? – Black Clover)

[Paikuhan – Dragon Ball Z] (Z Sword)

[Lady Shiva DC] – (Spiked Mace Nth metal DC)

[6 Black Keys] (Arrow Stand)

[Inventory*]

(Chr)

[Nelliel Tu Odelschwanck" – Bleach | Bazz-B – Bleach | Endeavor – My Hero Academia | Erina Nakiri – Food Wars | Sage – Marvel | Aang – Avatar | Guts - Berserker]

(Item)

[$1,750,000 Dollars, Aperture Science Handheld Portal Device - Portal, Demon Sword Lostvayne - Seven Deadly Sins, Zero Point Energy Field Manipulator - Half Life 2, Sukuna's Fingers (Jujutsu Kaisen), A single Dragon Ball (Dragon Ball), Jeweled Sword Zelretch, Kaleidostick Ruby and Sapphire, Demon Armor Teigu: Incursio, Apple of Eden Assassin's Creed, Asauchi - Bleach, Chaos Blades - GOW]

(Completed Template – 100%)

[Roy Mustang FMAB; Batman – DC Comics New 52; Feitan Portor;]

**

Beyond all this, I still had the 72 million accumulated from my allowance, thanks to receiving 6 million per month.

Today was the day I would get my evil pieces, meaning, finally, after turning 7 years old, I could retrieve them. And I already have an idea for 2 members in my nobility.

**

Riser was with his father to meet Serafall. Apparently, only a present Satan was needed for the high-class demon to get his evil pieces. For some reason, Serafall insisted on meeting Riser for him to receive his evil pieces.

"Hey, Riser, my son, you look nervous," said Razer, putting a comforting hand on Riser's shoulder. The boy nodded, feeling his heart race at the prospect of finally getting his evil pieces.

"Relax, it will be fine. Serafall is eccentric, but deep down, she is a good person," Razer tried to calm Riser as they approached the demonic capital. (Lilith)

Upon entering the central palace, they were greeted by a servant who led them to a room adorned with velvet curtains, elegant furniture, and a magical atmosphere. Serafall was there, sitting on an improvised throne, surrounded by an aura of mystery and power.

"Ah, Riser, my little demon! The time has finally come for you to obtain your evil pieces," exclaimed Serafall, standing up with enthusiasm. Her eyes sparkled with mischievous light.

"Yes, Serafall Leviathan, I am ready," replied Riser, trying to maintain composure, but the anxiety still pulsed within him.

"Follow me, Riser," said Serafall, changing her mischievous posture to a serious one. This time, Serafall was not wearing her magical girl outfit but her Leviathan attire. Although calling it armor would not be accurate. It barely concealed her skin, revealing many of her parts. Her attire bore only a small resemblance to Sirzechs'. Only Riser followed her; his father stayed behind.

Riser was clearly enjoying the sight of Serafall's body, in Riser's perception. ["It seems like your hips are swaying much more than usual."] thought Riser with a slight blush on his cheeks.

They entered a simply open room with a monolith in the center shaped like a "King" in a chess game. The place was incredible, with an intricate network of runes. It was more focused on the King piece, which was a monolith. The runes were rotating from time to time.

"All right, Riser Phenex. Place your hand on the stone and concentrate your demonic energy on it," said Serafall, still serious. Although her outfit was anything but appropriate in Riser's opinion.

Riser approached the monolith, placed his hand on the stone, and then displayed his energy. He always kept his energy at a high class. Then it suddenly surged to Peak-Ultimate Class.

Serafall Leviathan opened her eyes and was impressed. She did not imagine he would have this level of power. Not even Ajuka or Sirzechs had a reserve at this level at this age.

Riser then extended his hand, and a magic circle began forming on the ground. A bright light enveloped Riser, and he felt a strange sensation as his evil pieces were produced and incorporated into him.

[Sound of activating magic circle]

"Ah, I feel the demonic energy flowing through you. This is wonderful, Riser," said Serafall, with a satisfied smile. The boy felt a renewed energy, a dark force pulsating within him.

At the same time, an ornate box appeared. It was almost as if it was wrapped. Riser took his box, and he opened it to see what was inside. Serafall sneaked a peek too. Both opened their eyes in astonishment.

Mutant pieces: [1 Queen, 1 Rook, 1 Bishop, 1 Knight, 1 Pawn.]

"Wow! 5 Mutant Pieces, a record! To have mutant pieces, you have to have changed yourself. It's like being reborn and becoming different or something else. It's normal for a person to have 1 mutant piece. Or at most, 2 pieces. But 5 is absolutely absurd," said Serafall, already contemplating these ramifications.

Riser thought about his template; technically, each template brought a significant change to him. So, this quantity would make sense.

"Thank you very much, Serafall," said Riser with a more relaxed smile. Serafall patted his head and caressed Riser.

(A/N: Let's say that at the beginning of his little revenge, Riser used [Perverted Inner] + [Erotic Dream] on Serafall. Just read what these abilities do in the auxiliary chapter (STATISTICS))