Reincarnated With Endless-System

{A/N: Just want to tell you all that I made some changes to the status since I was thinking that my standard for status is too high, so when you go back to look at the status in the previous chapter, the status already changes. And also don't forget to join the discord server for Picture, suggestion, and all the latest information and some new updates about this fan-fic: discord.gg/eCwmhXJ}

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Demon-Blood Control Technique (0%)

◉Difficulty: B

Tohno Yukio is the first person in the world to mastered how to control Demon-Blood and now he decided to teach you how to control Demon-Blood for your safety. Prove that you can learn how to control your Demon-Blood.

◉Clear Conditions: Learn how to control your Demon-Blood.

◉Mission Reward:

▪ Obtained Skill [Demon-Blood Manipulation]

▪ Obtained 250.000 System-point

▪ Obtained 350.000 EXP of [STATUS] Level

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Muramasa Sword Art Technique (0%)

◉Difficulty: S

Muramasa Sword Art Technique is a sword technique created by its founder Senji Muramasa who is a famed blacksmith within Ise Province within the Sengoku Jidai period. Legend says that he has forged a demon sword that antagonizes the Tokugawa clan. There were stories about his Katana that killed Tokugawa Ieyasu's grandfather, there's also one that Nobuyasu used to commit suicide, and there's also one that cut Ieyasu himself. Tohno Anna who is one of the descendants of Senji Muramasa decided to pass one of her inheritance to you. Learn all of the Sword Technique that Muramasa Sword Art Technique has to offer.

◉Clear Conditions: Learn Muramasa Sword Art Technique

◉Mission Reward:

▪ Obtained Skill [Muramasa Sword Art Technique]

▪ Obtained [Muramasa Descendent] Class

▪ Obtained 600.000 System-point

▪ Obtained 1.050.000 EXP of [STATUS] Level

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When Tetsuya saw these 2 small screens in front of him, the first thing he saw when the 2 small screens appeared in front of him is the mission reward itself. He was so shocked since the mission reward that he can earn from is too great even if you compared it with his hard work in the past 4 years, especially the EXP reward and System-point that the mission can give is so extraordinary. Tetsuya never expected that he will get 2 mission under this fashion since this 2 mission itself was given by his parents present for his birthday. He also learned that his father was the first person to master the Demon-blood technique.

But when he looks at the difference of the difficulty between the 2 missions he widened his eyes when he looks at the 2 missions being an S rank Mission and B rank Mission. The only explanation he can get between the 2 missions is Muramasa Sword Art Technique Mission is related to the legend of a person and Demon-Blood Control Technique is related to the first person who mastered it. He also sees a percentage beside the mission that might have a function for the rate of completion.

'Well, no need to think too much, as long as I can get many rewards after completing this mission.'

When he was thought about the mission, he sees his father frown, he was confused at what happened to his father.

But after some thought, he realized that because he was more hype when he receiving his mother than his father's gift since in his past he is so interested in Sword Technique, that he decided to join the kendo club in his school, but after winning a gold medal in the Kendo National Competition, he left the kendo club because he was bored and find that kendo isn't interesting anymore and found it too boring rather than a sword fight that he like in manga or anime.

But suddenly after he heard her mother saying that she will teach him a sword technique that passed by many generations from a legend, he was so hyped that he shouts out with his eyes shining that makes both of his parents startled.

Tetsuya who is feeling uneasy because of that decides to talk to his father.

"Father, I want to study how to control demon blood first." Said Tetsuya while pretending to be interested, since he doesn't want to broke his heart.

Yukio who heard Tetsuya saying that, was happy that he is more interested to learn how to control Demon-blood than Muramasa Sword Art Technique.

Anna who heard that was pouting with her cheeks puffed.

~~TIME SKIP 2 MONTHS~~

POV Tetsuya:

It has been 2 months since my Father teach me their technique.

At first, It was easy since I just need to learn how to control Energy inside me, to control my demon blood.

Energy is different from mana since Energy itself is a power that comes from your body and Mana itself is a power that comes from your surrounding. 2 different types of energy inside of me are human energy and demon energy.

After 1 week of progress has passed, I have mastered the way to control human energy inside me, but that is just the beginning. After I mastered how to control Energy inside me, my father then teach me how to also control my demon energy that is hidden inside of my body.

At first, it was like hell, after my demon energy flow inside my body, my body feels so hot that my body can explode at any time, my mind started to feel corrupt with some wicked thoughts, and I almost go out berserk. Thankfully my Father gives me some energy to suppress the demon energy inside me, so I can stabilize the demon energy inside of my body.

After 3 weeks of progress has passed, I have mastered the way to control Demon Energy inside me, even though every time I almost lost control over my demon energy when I trying to master control of the demon Energy, my father has to knock me down every time I almost go out of berserk state. The next day after I mastered the demon energy, my father tells me that I have to mix my human energy and demon energy that is inside of me.

After 2 months of progress has passed, I have finally able to mix all of my human energy and demon energy into one energy.

It's taking too much time since it's so hard to mix all of the energy into one since it takes too much of my mental power to mix all of the energy. Suddenly a notification and a small screen appeared in front of me when I was relaxing in front of my yard in the middle of noon with my younger brother while playing together.

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[The Host of this system cleared 'Demon-Blood Control Technique' Mission]

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Demon-Blood Control Technique (100%) (COMPLETED)

◉Difficulty: B

Tohno Yukio is the first person in the world to mastered how to control Demon-Blood and now he decided to teach you how to control Demon-Blood for your safety. Prove that you can learn how to control your Demon-Blood.

◉Clear Conditions: Learn how to control your Demon-Blood.

◉Mission Reward:

▪ Obtained Skill [Demon-Blood Manipulation]

▪ Obtained 250.000 System-point

▪ Obtained 350.000 EXP of [STATUS] Level

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Not long after I complete the mission, soon I get so many notifications pop up floating in front of me.

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[You have Level up!]

[You have Level up!]

[You have Level up!]

[You have Level up!]

...

[You have Level up!]

[You have obtained 250.000 System-point]

[You have learned [Demon- Blood Manipulation]]

[You have fulfilled a condition to unlock Magic Training from [DAILY MISSION] by learning Energy Manipulation]

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'It looks like I have unlocked Magic Training by learning manipulating my Energy, well not bad, but I still haven't unlocked [SKILL], is this some kind of a bug or system is just too strict, well whatever.'

When I want to check my status in the [STATUS] system, suddenly 2 notifications pop up floating in front of me.

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Name : Tohno Tetsuya

Age : 4

Race : Half-Human/Half-Demon

Level : 17 (22.380/70.000)

Class : (None)

Title : (None)

HP : 8.500/8.500

Mana : 1.700/1.700

Strength : 41

Stamina : 37

Agility : 39

Intelligence : 55

Dexterity : 35

System-point : 346.480

[Since the Host of this system have learned Energy Manipulation, Host [STATUS] will gain a new source of power called Energy]

[Do Host want to Fuse Mana entity and Energy entity into one?]

[Accept] [Decline]

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When I saw this, my jaw almost falls out into the ground, not because of my status growth but because I didn't expect that the system can fuse 2 different entities.

"What's wrong Tetsuya-nii?" Ask my younger brother worriedly while looking at me.

"It's nothing." Said me while trying to continuing play with my younger brother.

After that, I decided to accept the fuse of both Mana and Energy into one entity.

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[Before processing to fuse both mana and energy, it's recommended that the host find a place that no one can bother the Host because, in the process of fusing, the Host will feel a lot of pain]

[Please say the word "continue", when the Host is ready to fuse both entities]

[When the Host already finds a place that no one can bother the Host, then the system will set a Barrier of soundproof so that no one will hear the Host screaming in pain.]

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'Hmm... How painful can this be if the system wants me to search for a place to seclude myself, Isn't this feels like the system wants to kidnap me.' I stare at the notifications with an anxious expression while smiling wryly.

"Shirou, I feel tired, I want to rest in my room for a little bit." Said me while looking at my younger Brother.

"Okay then, Tetsuya-nii." Said my younger brother while having a sad expression.

"Don't be like that, we can continue playing later ok." Said me with a smiling face trying to comfort my younger brother.

My younger brother only nodded with a smile on his face and go to the living room. After that, I finally, seclude my self in my room.

"System I want to "continue"."

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[Affirmative, start Fusing both entities into one]

[Duration of Fusing is 30 minutes]

[Start Fusing at 3... 2... 1... Fusing...]

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Suddenly I feel like my body started to crack into pieces and inside of my body I feel the heat that can burn me alive but at the same time, I feel the cold that can freeze me to death in an instant. I scream like a madman that went crazy, I feel like, I can go crazy at any time.

30 Minutes have passed Since the fusing process, my body feels very light right now. Suddenly a Notification pop out in front of me while I was in my bed feeling very tired.

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[Congratulation, The system have fuse both Mana entity and Energy Entity into one entity]

[All of the Host statuses have greatly increased due to the effect of fusing]

[Since Mana entity and Energy Entity has become into one entity, the new entity needs a new name. Do Host want to name the entity?]

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"Yes... Name... it Mana" Said me who has a tired expression while couldn't care about the name, so I name it Mana.

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[Acknowledge, the new entity will be given name as Mana]

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I was tired to hear anything from the system at the moment and after that, I began to lost my consciousness.

2 hours later in the afternoon, I wake up in my bed feeling fresh. As soon I wake up I decided to check out my [STATUS] system and only to be shocked by my status.

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Name : Tohno Tetsuya

Age : 4

Race : Half-Human/Half-Demon

Level : 17 (22.380/70.000)

Class : (None)

Title : (None)

HP : 13.500/13.500

Mana : 3.400/3.400

Strength : 62

Stamina : 57

Agility : 53

Intelligence : 87

Dexterity : 59

System-point : 346.480

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"I didn't expect the effect of the fusion of my Mana and Energy to be this great, especially my mana has been doubled." Said me while smiling.

I now have the strength comparable to be strong among all the normal humans but not as strong as a servant.

'If for example, I were to become a servant right now I will be the weakest servant FGO player ever gonna see in their entire life. I mean who is going to place a servant that looks like a 4 years old kid that has no noble phantasm in their FGO team. Well if I turn myself into Crimson Red Vermillion with my [Demon-Blood Manipulation] then I still can still defeat a weak Servant. Well whatever, I feel quite hungry, time to eat.'

As soon as I go outside, I saw my mother who is preparing for our lunch while my father was in the living room watching TV, while Shirou is playing with his Toys.

As soon as go outside my room, My mother called me to help out carried all the food to the table. As I carried all the food to the table, my mother suddenly speaks to me while pouting with her cheeks puffed.

"Tetsuya, Are you done with your Demon-blood technique?" Said my mother while looking at me with a pouting expression.

As soon as I heard her, my eyebrow is twitching. While I was training in the past 2 months, my mother keeps nagging me with this question over time to time, and to make her don't bother me anymore, I decided to finish up my Demon-blood technique in 2 months. According to my father, he took about almost a year to master this technique, but when he saw me who mastered this technique in only 2 months, he's shocked beyond his belief after seeing it.