Protoshield
The raising of the virulent Shield
A [Prototype] x Tate no Yuusha crossover
Greetings welcome back I hope you enjoy all of my previous fan fictions that I have written over the times.
This is L33t Horo, AKA Tsuki Haseo on Twitch and YouTube. I am a fanfiction writer and a Vtuber, I stream daily and upload the VODs on YouTube, please do look and subscribe if you like my work!
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I got the idea for this fan fiction out of nowhere so please enjoy and leave comments on this and previous works of mine thank you and have a nice day.
Chapter 1 Virulent Transmigration
"My name is Alex Mercer or was I was dead and consumed by a virus The virus took over my body I am both, Alex Mercer and the virus.
With the fight in New York over, I managed to survive a thermo-nuclear blast, carried over by a crow I moved to another country, slowly regaining biomass to eventually restore my human body.
Obviously the only people I consumed for biomass were unrepentant people, mostly serial killers, rapists and the like.
Truly evil people who have no worth to society, the least they could do was feed me.
And by absorbing them I learned their sins and crimes, and with that I gave an "anonymous tip" of the victims, both alive and dead.
They may keep looking for those bastards, but they already paid their dues with their deaths.
And so I found myself traveling to Japan of all places. I managed to sneak onboard by pissing as a corrupt air marshall, apparently he was working alongside a terrorist cell that would hijack the plane, obviously that would go against my plans and so I absorbed them all, gaining all their knowledge.
And thus Japanese language was adquired.
Japan was a nice country, crime rates were VERY low, mostly due to crime organisations being… organized.
Theft, murders and the like was rare, mostly cause of Japanese's people own culture.
They were a society driving people were HOW they looked to others mattered.
Obviously, there would be some outliers, but those were few, and thus crime rates were very low. You could loose your wallet and, provided it had your identification, you could find it on a police station where a person left it.
And so Alex Mercer, AKA Zeuz began his life in Japan.
Due to the thermonuclear explosion in Japan, Alex was considered dead, thankfully the story about the viral outbreak was suppressed and news about his existence covered up.
New York became quarantined in order to reestablish order, therefore no one could get in or out unless from the military.
What's amazing was the Blackwatch managed to stay in business, the little oddest that happened was suppressed and they were not much worst for wear.
It was likely that they would keep searching for him.
Tough luck, as he was across the ocean now.
And so he went to a bookstore to read books.
He enjoyed a certain book cafe as he ordered something to eat to keep appearances. He grabbed a book with an unusual title.
"The story of the four legendary weapons"
Alex looked at the cover of the old beat-up book and open it and slowly began to read the legend of the four braves.
After seeing the conclusion of what he thought was the conclusion due to the book having blank pages at the end the story about the shield hero was left to the imagination however the first princess according to the book was a cruel person while the other heroes were not really that good either. All of them infatuated with their knowledge thinking themselves superiors to one another and the Shield who tried to get them all to get along got ignored.
Alex Mercer sighed, "I can't believe there's still people like this well…it's not me dealing with all of this"
As he said so on the floor an intricate magic symbol appear and a flash of light came and the devowered him.
He felt the floor change, before he was standing on a book cafe the floor was made with wood, however now he was standing on a floor made of cobblestones.
Alongside him where three other people young by their appearances and all of them wearing a weapon, one held a spear, another held a sword, and the third held a bow.
He noticed that he had a shield on his arm, and was looking around questioningly ready to attack any will had any hostile intentions towards him.
A small group of people was claimering at them and one of them asked them to save the world, so after asking for clarifications they told them that all 4 have been summoned as heroes too safe this world, Alex could not believe what was going on.
He was a being of science, therefore he never thought about Magic or the like he was a person who was leaving science as he as a human was a scientist as well.
They were escorted towards the throne room where a bigger group of people awaited them all of bated breaths.
The king open his arms and welcome the heroes however once he saw Mercer he gave a slight glare towards him.
He explained what was going on and the recent they have been summoned besides him where certain people that look to be like from the clergy which were given nasty looks towards Mercer, however he took it in stride.
The king asked them to please introduce themselves.
The first one to introduce himself was the young man with a spear Motoyasu Kitamura, then the young man with the sword Ren Amaki and then the young boy with the bow Itsuki Kawasumi.
However when it was time for me to introduce myself I was told off.
After some formalities all 4 of us were allowed to mingle.
They were all either college or highschool aged boys, while myself being the only "adult".
To be fair, I was the youngest, as I was a recent creation, while I have all of Alex's memories, in the end I am not Alex, I am "the virus who took over Alex's life"
They bagan to talk how this reminded them of a particular game they played, however all 3 of them gave different titles and systems of said games.
One was a retro console, one was a more modern one, while another said it was a VRMMORPG.
I looked inward at all the memories to see if any had any memories of said games or systems, as I was to busy saving New York and surviving to care for said things, also Alex never played.
None, but the term VRMMORPG was something I recalled from the web of memories, it's a term for a category of Isekai mangas of some sort.
They decided to check something and they all have the name of the prime minister of Japan… each one gave a different name.
I pondered, could it be we are each from a parallel reality of earth? Is that the difference? Could there be an "Earth" that did not have Blackwatch?
As they talked they turned to me, who still had part of my face covered due to my hoodie from my jacket.
I took it off and showed "my" face.
"Man, you are the eldest of us all, so.. should we Andreas you as Mercer-san?" Motoyasu said feeling awkward.
"Just Alex, we will be working together so I suppose it would be best to forgo of honorifics" I said.
I saw how they were looking at the shield I held so I asked "Is there a problem with this shield?"
"Not so much as a problem to us, but more to you sir… I mean Alex" Itsuki said.
"The shielder class… well they posses high defence, but late game they are useless due to damage that works off defence, they also have little to no attacking power" Ren said.
By the sounds of things they believed that the rules of the games they played are the same as of this world, or maybe they believe they are INSIDE the game that they played.
They told him about the menu function, which Alex was taken back, it was similar to when he upgraded his abilities, no… it was similar but with differences.
It showed the information about him
Name: Alex Mercer
Race: Human(?)
Class: Hero
Level: 1
Equipment: Virulent otherworldly Jacket, Virulent overwordly shirt, Virulent otherworldly pants, virulent otherworldly shoes.
ALERT, HERO POSSES NONSTANDARD ABILITIES, CORRECTING ISSUE
Alex felt he was being teared appart, something was attempting to consume him.
Well they had another thing comming.
With his willpower and biomass he fought the corrective power.
" You think you can costume ME?! I AM THE APEX! " He roared as he consumed the corrective force shocking the shield and world system.
The shield's gem then changed color to a deep and dark red, the shield also changed shape, it looked more menacing and darker and gave a faint miasma.
"New Shield series tree opened: Virus Path"
"Virulent Shield I: Enhances Poison and Virus related attacks (illnesses) small, enhances health recovery via consumption medium.
Nullifies Poison/Illness"
"Hero's skill unlocked, corrective force adquired and absorbed, all Shield Hero's previous inborn abilities have been forciblylockedapproved
"Shield hero exception: any weapons made from his own body do not count towards the prohibition of external weapons other than the holy shield,"
I smiled as now I held am edge over them all.
Even if I was level 1, my STATS as they called it, were 40 times theirs, at minimum.
That also meant that I could become even stronger.
So as they explained a bit, and also withheld some info we where told they had special room for us. I went with them and pretended to sleep.
Even if I could, I wouldn't be able to do so.
There was a 5th person in the room, that person was hidden, but my virus senses allowed me to perceive said person.
Said person held hostile intentions towards me.
" As they say, cut the problem at the bud" I thought as I charges when the person decided to turn away.
"Gah!"
Before the person could yell I consumed him and his memories and experiences became mine.
What I saw sickened me, even if I was not human.
This piece of garbage of a being was a "Shadow of the church of the 3 heroes"
A mayir religion in this country that demonized beings called demi-humans and the shield hero who protected them.
This country hated BOTH.
Also all of us were NOT supposed to be summoned to the same country, but each one to another country, when the defacto ruler, the Queen (due to this country running on a matriarchy, VERY progressive I must say) left for a diplomatic mission, the church AND the consort king used her absence to do this.
Also, they were planning on assassinating me should I be a competent one, or frame me for a heinous crime to sabotage my growth… it seems that the princess was onboard and she was the one who volunteered to do the framing part.
He also saw that every one of the shadows had a suicide pill as to not be caught and forced to confess, they had complete loyalty to the point of not doubting to kill themselves to prevent leaking of information.
Too bad for them that his methods were far from the norm in any world.
He should still act as his rol was supposed to function tough, as to prevent from them acting rashly.
He understood many things.
He would not be getting any companions as none would party up with a country's enemy deity.
Any companion he WOULD get from tomorrow would only be saboteurs and spies for the church.
The memories gave him a new way.
It was completely legal to own a slave, provided it was a demi-human, I'm this country, and he knew where to go.
Alex thought he should ask for more monetary starting money as a way to solvent for him being without any companions.
The next day
They were all gathered in the audience hall after having a hearty breakfast, Alex excused himself, saying that he wasn't hungry as he had a good meal last night and was still full.
A partial lie.
The bio-mass was neglible, however it seems his shield absorbed some of the items the Shadow had.
"Shield series: Camo, Able to hide status and characteristics even of the holy weapon, defence 1"
When breakfast time was over each hero got some companions, save for Alex, but he already expected that.
"Due to no one wanting to party with me, would it be okay if I received a bit more monetary help to help me? While companions are great, this world moves with money as well" Alex said.
The king looked at everyone and they accepted, they couldn't be seen as not doing anything afterall.
And so he obtain twice and a half over the starting silver.
The princess was taken back but decided to step forward. However, Alex had swiftly left the audience room, leaving the princess with her words in her mouth.
He left town and decided to see the local blacksmith, this guy had a good reputation and his wares were of reputable quality. Such was his work that he even was comissioned to provide weapons and armor for the soldiers at the castle.
One thing he managed to learn was the ability of his shield to copy other shields in order to obtain more bonus skills or stats, he decided to get a shield or two.
"Hey there boy! You must be the shield hero uh? What can I do you for?" The man said.
He was genuinely good person, Alex could tell from his body language. So he smiled at him, I need some strong shields you may have, could you display any with good defensive properties or that have any abilities?" Alex asked.
Erhard began to ponder. "Not any that would suit you at your level… but this might help, it's made of light metal."
"How much?" I asked.
"For you, let's say… 400 silver" Erhard said with a smile.
I paid without haggling due to what I was gonna do.
I grabbed the shield and placed it near the gem and then…
"W-WHAT?!" Erhard was taken back when my shield changed to match the one on my off hand.
"Keep the original, thank you very much" I said.
"Ah… hold on Shield bro… can you explain what you just did?" He asked.
It seemed that, while heroes are well known, the mechanics of their abilities were not as widespread.
I explained about the weapon copy function and how it can copy any weapon, provided that it was of the same class.
He grunted and grumbled "I see, well thanks for letting me know, if you weren't the honest type I would have lost a lot of income, imagine if the heroes would come and just copy everything without paying! I would be bankrupt!" He said.
"Well, now you know, they might be angry at not being able to get around paying for them, just don't tell them you found out from me okay?" Alex asked.
"No problem Shield bro… my lips are sealed" he said with a grin.
I had a lot of silver left, so I decided to go to the place from the Shadow's memory.
Beloukas tent.
The tent looked like a typical circus one, however inside was a menagerie of slaves, many in horrible and deplorable states.
The slave master Beloukas, greeted me and showed me deeper into the tent.
Many were rather expensive, and had some crippling status, this guy was showing me this first so he could sell his inferior wares better it seems.
I told him for a slave that was cheap, and unassuming, preferebly young and low leveled, that way I could power level him or her.
"Ah the shield hero seems to know what he is after, very well please follow me" he said with a grin.
It was a cage that held children.
Demi human children.
It was at times like this that my inhumanity was a blessing.
If I had any left I would have consumed this human garbage.
They all looked quite bad, malnourished, beaten…
There were too many that were just useless, however there was one, she was ill, almost to the point of dying, however… due to my knowledge as a scientist I could prepare something to if not heal her, combat her ailments.
So I took the small raccoon type slave girl.
The ritual for the slave bond was a bit… complicated as I had to give a drop of.my blood to register… so I inoculated a part of me as to not infect her, a drop of my "blood"
A liquid part of the virus, completetly inactive.
The slave crest was done on her and Alex looked at her, the virus still in active, that was good… he did not want a repeat of what Elizabeth Greene did.
And so on his owriferal vision, Slave A appeared.
"Child… what is your name?"
She wished to speak but she couldn't, her thought was too parched and thus the slave crest shocked her.
He looked at the slave trader for an answer.
"Because she couldn't do the order the crest punished her, simple as that it has nothing to do with me my good sir" he said with a creepy smile.
"Please give her something to drink, I don't want her punished when she is unable to comply with an order due to things out of her control" Alex said.
"Ah I see… you can adjust the settings of the slave crest as you wish, so a repeat of this will not happen" he said.
After drinking a bit of a water she said her name…
"My name… is Raphtalia"
With that Slave A disappeared and changed into Raphtalia.
Now he had a loyal attendant not bound by his virus.
He looked down to her, "So long as you follow my orders to the best of your ability you will need to fear any punishment, so come" Alex said as the young girl, Raphtalia meekly obeyed.
He went back to Erhard store and ask him for a short sword that would suit the girl.
Erhard What shop to see that the shield hero had a young girl as a slave however Alex retail the story of how he got her.
"You do know that she is very sick don't you shield bro?" Erhard have asked half stated.
"Don't worry about it she will be fully healing in a while I'll make sure of it" Alex said as he pattered a young girl's head.
Raphtalia receive a short sword and a skinning knife and both of them left towards a high level hunting ground with the memories he got from the church's shadows they will be too much for regular shoulders and even some heroes especially at his level however Alex status we're overwhelming the higher than any of the kingdom's soldiers and even the heroes.
He set Raphtalia as a party member and told her to stand behind him as many canine like monsters begun to congregate.
He gave a cruel smile towards the monsters.
His arm then transform into a cruel looking blade in charge towards the monster slashing left and right that the company of sounds off the bones breaking and the monster streaming in both anger and pain feel the area as the young girl look at the brutalizing manner as whitch Alex destroyed all of the monsters.
They were over 40 monsters each one of them were level 20 I mean there were 20 times the level that they currently have and so their levels increase exponentially
Shield hero LV 15
Raphtalia LV 16
There was another reason for Alex wanting the young girl to power level with him when doing the slave ritual a drop of ink fell into his shield which unlocked a new series of shields.
Slave shield serious I : slave maturation adjustment rate (small)
Decent that all of Raphtalia's stats when she level up would increase slightly more than usual which would be quite a boon as the stronger she was physically meant that she would be able to heal faster they also started to collect every single type of plants that could find and feed it to the shield as well as feeding the shield all of the monster parts together which unlocked new shield series as they as a continued.
Many of the shields that he managed to unlock gave us a slight increase to his status however some of them gave him a very slight attack increase, she figured that due to the nature of the shield most of the status upgrades would be revolving around defense and vitality.
"Master just who are you?" Raphtalia ask still shocked at the way her master's body was able to shift into a weapon.
"My name is Alex Mercer I am the shield hero… and Blacklight" he said, "I will ask you never to tell What had just happened here we shall keep going and further increase our levels follow my rules and you will never be punished, you will be fed your be clothed, you'll be healed and you will be educated, in turn I want you to ask us my sword when we are around others I will not be able to act as this when the other heroes are around or other people I don't wish others to know what I can do, this country has a deep seated hatred towards the shield hero as well as towards your kind the demi-humans, follow me at your part and you will be rewarded"
The young girl look up to him and so he's face it was an impassive look but she understood one thing he meant everything he said and she nodded, this was how this little relationship began.
The two of them returned to the city, Alex shifted his looks to look like the shadow and took off his hood and sold all the monsters part that he had in stock he managed to gather 400 silver in total, adding to the total of 800 silver that he already had.
Erhard looked a bit put out by his choice of slave, however he said nothing as the hero looked competent enough and did buy the best he could for the girl.
When Alex left the shop Erhard wondered if somebody had told him about the Demi humans growth. "I mean this slave trader probably told him, it would be pretty irresponsible of him to forget about that, right?"
Alex and his slave the young girl Raphtalia, went to a restaurant he bought a kids meal set for her, well he just ordered whatever was cheapest as he had no need to consume actual food as his nourishment was any creature's biomass.
He noted that he didn't look and gasses that the other patrons of the restaurant gave him and his charge, murderous intent filled him.
It was one thing to hate him as he was a living plague, however this young girl had done nothing to earn their ire and hatred.
He took note on the young girls inability to use utensils so he's slowly and methodically began to teach her as the days went by she taught her manners as well as proper etiquette, I stayed go by he noticed a small girl begin growing somewhat.
He was one day where he went to an apothecary who gave him a small book about medical plants and when the shield accidentally touched the book it opened a new shield series.
"Compound shield series: compound mixture skill"
With this he will be able to conquer simple remedies however due to his knowledge as a scientist and knowing what the plants do he could enhance deficiency of any and all potions.
Virulent shield series level up Virulent Shield II: compound skill level up
Compound (small) - (Large)
A plethora of different medicines and other potions and poisons were now available for him to make it seems that the violent shield series was evil to further upgrade any other shields series by allowing experience and his expertise to flow into them, the first thing he would compound was a psychiatric medicine as the girl had many nightterorrs, The other medicine he would do was, ironically, and antibiotic ask her illness was still ravaging however due to better care in both her diet and health care she was able to not be feeling as bad as before, however if her disease was not taken care of it would be detrimental towards her growth, and Alex will not allow that, he remember the life of his host body before they became one, He's memories of Alex Mercer, the human, when he care for his younger sister and work hard to allow her to have greater education and a better quality of life.
After some snacks he gave her the pill that was to be the antibiotic The reason for the snacks was due to the antibiotic harming the intestinal flora should there be nothing in between them With a small sip of water she took the pill that was compounded from the herbs that they found. Raphtalia felt how the disease was being washed out by the medicine that she just took, unknown to Alex his shield increase the effectiveness of anything he compounded meaning that what would have taken weeks, even months, was done in but mere minutes.
After a whole morning and part of the afternoon spent in hunting and leveling up, they decided to take a rest and build up a small camp, Alex began to work the spit in order to cook some meat for Raphtalia.
She asked her master why he never seemed to eat or drink.
Alex smiled and told her about himself, but not before ordering her to never tell anyone.
He told her what he was he told her what he is, this shock the young girl very much but smiled "it doesn't matter to me what you wear or what you are, you were the one who saved me"
Raphtalia hugged Alex who was despotent to do anything but inside what could be called the heart for a living virus… he felt a small warm feeling that he thought he would never feel, a vestige of the feelings the person who was Alex Mercer felt.
Care… compassion…
Night came and due to how lady was the city's gates were close so they had to come out, he gave Raphtalia another medicine, this one made to help her mental maladies, however this was less effective, it calmed her down at night, however she still had nightmares, this meant only one thing.
Raphtalia had suffer out horrible emotional trauma he had no flew what he could do however until they find away to deal with it it will further block her growth.
Unknown to them the church of the tree heroes were tired of waiting due to the first princess's plan not working due to him not allowing her to enter into his meds then he decided it would kill and does prepare a huge monster a three-headed dog monster to attack him, they knew that the girl had a trauma with said kind of monster, as it was them who release said monster to her village before, who killed all the adults and allowed for the slave hunters to come and round them up and sell the filthy beasts.
The church's shadow was standing by when he felt a cold air passed through him.
He look down and so a horrendous evil looking blade pierced his body as he felt his body's lowly drained away which was weird due to the blade still being in there and he noted with horror that he was being sucked dry, literally.
Alex Mercer consumed this shadow and learned something else, The Pope's master plan.
He was not the intention for the summoning to have the shield appear, they were only looking for the three cardinal heroes the spear the bow and the sword however it seemed that it was the king himself will held the most hatred towards the shield hero who wanted it summoned.
The reason? Simple, it was too bent out his anger and hatred.
Way back then, when he was young he had a sister and when he went to war the country he was at war with decided to hold peace meetings however when he went back home he found out that his home has been broken into and there was blood everywhere and his sister nowhere to be found he was told that the delegation of people that came to the peace treaty had kill his sister and enrage he went to war with assaulting tension to kill all the white tiger demi humans, him being the stuff hero enable him greater power and thus he became a symbol of terror, however No matter how many he killed he was never satisfied, as the hollow in his heart could never be healed.
He decided to humiliate then he great and eventually half the shield hero be killed as to spit and ridicule on the people who worshiped their shield her as their deity, who just so happened to be demi humans, the beings which he so much disputes and hates.
The monster they release was level 50, there was no way they could survive, or so they blisfully thought.
After consuming him he went directly to what's the monster. Thankfully there were no other people there to see what he was about to do he used his tendril whips and slash at the monster which gave a terror inducing howl of pain.
Raphtalia woke up and quickly exited the tent, what she saw then had her frozen in place.
It was the same monster that destroyed her village, the one that left her an orphan, the one that gave chance to the slave hunters to come and gather them to sell them all, the one who caused all the misery that she experienced.
Yet, even leveled up as she was, still held fear.
"If you can't do it, that's fine, I said this before… I will not allow that tragedy to occur to you anymore" Alex said as he shifted his arms into huge fists.
He jumped into the air and used his special move. His fists the prodruted with spikes slammed into the ground with power unable to be equated by his human mass, the floor exploded as virulent tendrils sprouted and pierced the monster.
The monster roared in pain as his body was being devowered from the inside, the tendrils coursing trough it's veins and capilars further damaging it until it died a slow and suffering death.
He switched to his Virulent Shield II and allowed the shield to consume the beast.
New shield series unlocked: Orthrus Shield, Fire resistance (medium), Counter bite (when attacked by a melee attack the shield will bite the opponent), defence 10.
To be fair he hated humanity, all his wondering in the world he was originally from showed that humans were petty and horrendous creatures… but with Raphtalia there was hope, if he could make it so that this girl could beat the cynical view he had about humanity…
He let those thoughts vanish… it wasn't the time. And if this world wasn't worth saving…
He would turn it into a virulent hellscape… what had happened in New York would pale in comparisson.
With the death of the hellish dog monster their levels also increased.
Alex Mercer : LV 30
Raphtalia: LV 29
They went to sleep… the morning after however Alex had a rather explosive awakening.
Chapter end.