The Plan

Somewhere, in an unknown period, a portal opened up and a very handsome young man wearing a black kimono holding a katana in his hand walked out.

he looked at his surroundings, chose a direction and walked off.

25 years later the same portal opened up on a battlefield, the clouds were red, rivers of blood flowed through the land, corpses could be seen stacked upon each other, Demons, vampires, Dragons, Monsters and even gods.

there were too many to count, they formed mountains of corpses, the land was destroyed beyond recognition, mountains crushed, seas evaporated, it was a true hell on earth.

in the middle of the battlefield, one could make out a kneeling corpse which relied on his sword not to fall down, it had no wounds and yet was drenched in the blood of countless beings, one could see that he was the center of the massacre that happened here, he was surrounded by innumerable corpses of his fallen enemies.

he was the same young man that had stepped out of the portal, the sword was the same katana and yet had many changes, there were countless blood-colored runes on it which didn't exist before, it made the blade of the sword appear completely red as if drenched with blood.

Before Aki sent his clone to this world, he gave it Yamato with an upgrade, The upgrade was a simple but powerful one, it gave the katana the ability to evolve by killing, the more blood it spilled the stronger it became, with each powerful being it cut down, a blood-colored rune was added.

he had sent this clone to an alternate timeline, in the far past where the age of gods had not yet ended, The Clone used Yamato to kill every monster it could find across the years, eventually, it attracted the attention of gods and demons alike, One day a god descended to put an end to him, he was becoming too powerful, the gods felt threatened.

that was the day he killed a god, but it wasn't over, more beings felt threatened, it led to a strange unity, all phantasmal species, Demons from hell and the great gods formed an alliance to kill him.

it was too late though, The clone had used Yamato to kill many beings already, it had grown unstoppable and since it was bonded to Aki's aura, it made Aki's Clone stronger too, the sword could bring out the potential of its wielder.

all manner of powerful entities joined together, creating an unprecedented alliance. the day came, they all faced the clone together, it wasn't enough, the longer the battle lasted the stronger the clone became, there were simply too many enemies, the battle lasted for months.

Months of unending slaughter, the clone killed every single one of them, he grew so powerful that it didn't even matter anymore, Yamato had become a treasure of absolute slaughter, at this point, the clone's lifespan came to an end, he perished.

The world was damaged beyond repair, the battlefield was the size of a country, it became a forbidden land, whoever stepped inside never returned.

the clone's actions were recognized by the throne of heroes as heroic, he made it seem like he was doing it for the sake of humanity, he earned a place in the throne of heroes.

the moment his life came to an end, Aki's original soul appeared on the throne. the portal swallowed Yamato.

in a house in the Fuyuki city, a child was tied up, and a young man was drawing a magic circle with the blood of the child's dead parents, the portal opened up and threw out Yamato in the corner of the room, none of them noticed.

The circle suddenly began shining, the young man became very excited, the child terrified. it searched for the nearest relic and it found Yamato thus instead of the original caster of Fate/Zero it summoned Aki.

Aki appeared wearing a strange attire that he didn't recognize, a very simple black kimono, its origin Japanese, Yamato flew off its accord into his hands. he ignored everything else in the room and used a recently acquired special ability of his red eyes to look at the stats in which he had been summoned. (search for calamity god Yato, that's what he is wearing.)

Name: N/A, Title: Nameless Calamity, Death incarnate

Sex: Male

H/W: 184cm, 80kg

Class: Caster[57% compatibility] (possible to summon as Saber [100%], Berserker[87%], Assasin [62%], Avenger[44%], Ruler[22%], Grand servant [90%])

Alignment: Chaotic Neutral

Status

Strength: A -> EX when in possession of Yamato

Endurance: B -> EX when in possession of Yamato

Agility: A+ -> EX when in possession of Yamato

Mana: EX

Luck: C

NP: EX

Class Abilities:

Territory Creation: E

Item construction: E

personal Skills:

Crimson Eyes of Massacre: EX

Divinity: A+++

Ninja Techniques: A

Noble Phantasms:

Yamato, The Unending Slaughter: (False EX), (True ??) [Anti-Army, Anti-Divine, Anti-Unit]

Death's Kimono: B+ [Anti-Self]

The Attire he wore when he unleashed a calamity upon heaven and earth, drenched in the blood of numerous gods. (Grants A-Rank magic resistance to the wearer)

' As I predicted, because of numerous Jutsu and my eye powers, I can be summoned as Caster, the next step begins.'