Introduction

A/N

Before you start reading, I want to warn you that there will be many time skips, since I do not have enough experience to write something worthy without basing it on anything. After I'm confident enough all these holes will be filled with flashback-no-jutsu.

A soul that has lost all striving for life flies in the void, but this is our main character who will soon receive a new goal in his empty life.

What was his life before, you ask? The boring and empty life of an ordinary teenager who lived an ordinary life of a person who was absorbed in the TYPEMOON universe, although he himself understood that if he got there with his luck, he would be dead in the first incident.

Suddenly, after an indefinite time, he saw the text in front of him

[Customize your character]

And then the inner otaku woke up, the first of course is the appearance, our main character has always admired Scáthach, so the male version of the Queen will soon appear and shake the whole DxD world. Why this particular universe? For many reasons, for example, to humiliate the protagonist, because such stupid heroes as Issei still have to be trashed. The second reason is to create his own faction, which will be associated with his beloved universe. Another reason, of course, the girls, although he had a relationship and he is not a virgin, something was missing in this relationship.

[Indicate the abilities you would like]

The first wish that he asked for all the strength and experience of Nytri Vespria from the book Nanomancer Reborn - I've Become A Snow Girl, or rather, he was interested in only one ability related to technology (the meaning of the ability is that while there is a drawing in your head, you can create anything). Why would he need her experience? If you read the book, you can find out that the heroine was the best killing machine that ever existed, she killed so many people that Esdeath is practically harmless against her background? Her fighting abilities will make Scáthach embarrassed. Even the soul of our protagonist was already broken, so everything that Nytri Vespria went through would break him even more, but who needs weak-willed heroes?

Second - Mystic Eyes of Death Perception, because it's one of the coolest and simplest things that can kill anything? So why not?

Third - a system that will help him, no slavery, if there are any tasks, then only rewards, no punishments.

Fourth - the magic of Anos Voldigoad

Fifth - an infinite amount of energy, regardless of its type.

Sixth - Demon's Extract like Esdeath, what about the demon inside? If you know how sadistic Nitri was, then the demon inside Teigu will wet his pants in fear.

You might think if this is too much? There is never much power, the more he wants to become the number one creature in the top

It remains only to choose the time when he wants to be reborn. The best time he thinks is 1 BC. After all, he possesses technical immortality - never grow old because of nanomachines.

After setting the time, the soul was sucked into the portal and his adventure began.

Time skip before the Kokoballs battle

During the fiery speech of the eared, a purple cat with heterochromia appeared on Asia's head - one blue eye, and a circle instead of a pupil, the other - gold with a star, which surprised her. She took him in her hands and began to stroke him to calm down. After that, as the "elf" told about the death of God and the others were in shock, the same cat suddenly appeared on Kokabiel's head

- It's been a long time that Kokabiel we has seen each other. I was away for only 500 years, when I was "Land of Shadows", and here is such a mess ...

After that, the cat jumped off and turned into a handsome, tall, young man with dark purple hair in a combat suit like from the future with two katanas on his belt, but most notably, his left arm is completely mechanical. In the next moment, Kokabiel was impaled on a pillar of ice, causing the young demons and others to vomit. As they recovered from the shock, everyone present heard a voice devoid of any emotion.

-See you later, say hello to your leaders.

Scáthach then teleported to Hanging Gardens of Babylon.

While our main character was gathering his team back, after a report from demons and exorcists, Michael Azazel and Sirzechs broke out in cold sweat.

In Underworld report by Rias

- Brother, we were attacked by Kokabiel, but at that time he was killed by a young man with strange eyes and an mechanical hand

- Please, just don't say that he was killed by being planted on a huge ice stake.

- Yes exactly. Something wrong?

"You don't need to know yet, but remember, the one you met is a much stronger creature than Great Red. I am sure that we will meet him at the signing of the peace treaty.

Time skip to Peace Treaty between Factions

While the leaders of the faction are trapped and the younger generation is fighting with the magicians, no one noticed a tall young man with dark purple hair and unique eyes , who was in the shadows all this time watching.

During the fiery speech of Katerea Leviathan, many began to hear the sound as if someone was eating something. Turning around, they saw a strange sight. A young man and a blonde with green eyes in 3D glasses, sitting on the couch, eating popcorn. Those who recognized him broke out in cold sweat, while the rest had question marks above their heads.

-Umu, this sight is worthy of this emperor.

- Heh, I said it would be fun.

A very angry Katerea hit this strange pair with magic, making a serious mistake.

- Nero, wait here, apparently it's time to take out the trash.

After these words, a scary smile crept on the face of the protagonist and the color of his hair changed to bright blue, at the same time a sign appeared on his forehead. What happened next? Five minutes later, the whole field near the school was covered with the corpses of magicians and in the very middle hung the mutilated corpse of Katerea. (A/N MC is battle junky, however when his sadistic side comes, he becomes smth like Alter)

While this was happening, everyone in the room could only shake with fear, and not from the spectacle, but from the thirst for blood that emanated from Scáthach. The most amazing thing was that the ground next to him was dying.

Returning to the faction leaders, his lust for blood disappeared, his hair color returned and the mark from his forehead disappeared. With a snap of his fingers, all the corpses on the "battlefield" abruptly turned into ice and crumbled, leaving no trace. His clothes also changed - black skinny jeans with black sneakers and a purple T-shirt with one sleeve that completely hides his left hand.

After that, there was an awkward silence, Michael, Azazel and Sirzechs did not know what to say to their old friend, and others simply did not understand who he was and what was happening.

The one who broke the awkward silence, a strange squirrel-like animal that appeared on Scáthach's shoulder.

MC POV

- Let me introduce myself again, if someone has forgotten me or did not know me, my name is Scáthach, yes, the killer of the Gods, the owner of "Land of Shadows", Nanomancer, wielder of Sacred Gear Demon Extract and teacher of many historical figures. And, next to me is Nero Claudius the emperor.

- Umu, greet me.

- First of all, I want to say that in the future I will act as an observer, and help when necessary, but do not hope for more. Secondly, Sirzechs, I give you a choice, either you drop all charges against Kuroka and give out the Naberius clan, or my entire team will oppose Underworld, and I hope YOU understand the consequences. Third, Michael start ruling the church normally, I still haven't forgiven you for Jeanne, or do you want me to send Jalter to you? However, after it, hardly anything will remain, but there will be no problems with the church either. And, you, Azazel, we'll talk later in Grigori.

Moving my gaze to Rias, I was honestly disappointed, even though I expected it, but her powers and her peerage are just disgustingly weak. Not even that, you can't even call them weak.

- And you, spoiled princess, start monitoring the city normally, otherwise I will forcibly take these rights from your faction. In any case, this city does not belong to you, I wonder how Yasaka will react if she finds out what is going on here.

At that moment, Issei, apparently unable to withstand the "impudent speech", decided to pounce on Scáthach.

- I'm sick of this, you're just human, how dare you be so rude?

Although Ddraig tried to stop him, before he could even get close to me, a spear was stuck in his heart. Which spear, you ask? Namely the one for which I am known.

3 POV

No one could even understand anything, at one point Issei tried to attack Scáthach, but then out of nowhere a red spear appeared, which emitted such pressure, that the leaders of the factions almost faint. Only a few realized that it was Gae Bolg. Those who were weaker did not even see what happened, but the result - Issei with a hole in his chest.

- Ingal

From the magic circle, Issei appeared being alive, who did not understand what was happening. Through a mental connection, Ddraig told him to shut up, otherwise this cycle of deaths will repeat more than once, because he himself personally saw this madness before.

After that, Scáthach turned into a cat again and jumped on Azazel's head to sleep, because the rest is not interesting to him, the details of the peace treaty blah, blah, blah...

During this time Nero with Fou went back to Hanging Gardens, because interesting things already finished.

After some time at Grigori

Before Valina, yes gender bender Vali, spoke about her joining the Khaos Brigade, she asked Scáthach for a fight.

Azazel prepared an arena for them. Valina, knowing how strong her opponent is, decided to give all her best. The main character, knowing her abilities, decided to use purely physical strength. Despite all her attempts, he either dodged or parried her attacks. This exchange lasted for half an hour. The moment he heard that Valina decided to use Balance Breaker, the protagonist knew it was time to end. With an incredible speed, which is more like a teleportation, he ended up behind and with a short blow to the back of the neck, Valina lost consciousness.

After exchanging a few words with Azazel, Scáthach teleported to the base Hanging Gardens of Babylon.

MC POV

[Quest - Save everyone on Night Raid]

[Accept / Decline]

"Finally, quests in the multiverse will be fun, especially since there are so many heroes that I would like to save and change their fate."

But, before that I need to decide whether I will be alone, or take someone with me.

Author note

Servants:

Artoria (Saber Alter, Lancer Alter)

Jeanne D'Arc (Both)

Semiramis

Anastasia Nikolaevna Romanova (Caster)

Nero Claudius (Saber)

Okita Soji (Alter)

Tamamo no Mae (Caster)

If you want more Servants, I'll try, but I do not have enough knowledge about all of them. Later I'll add Ereshkigal. During quests I'll bring one or two, otherwise there'll be only interactions.

Vote witch Servant to bring on quest (only one this one, because I want you to understand their relationships)

Artotia Alter

Jeanne Alter

Artotia Lancer Alter

Okita Soji Alter

About romance idk, because I never felt love, but MC would not use brainwashing or slavery, so I'll try my hardest.

This chapter is kinda of introduction, next I'll try to write between 2-3k worlds, for each world it would be several chapters, DxD main world.