Sword

That is the core of the being known as Shirou Emiya.

Tempered by the flames of all the world's evil.

Reforged within an ever distant utopia.

Finding Purpose in an inherited ideal.

Experiencing its ultimate flaw.

But accepting it all the same.

Because no matter what,

Helping someone

Could never

Be wrong.

21st century Japan

Satoru Mikami is currently meeting his junior Tamura. The cheeky gremlin wanted to show off his fiancé to his senior, the nerve! Apparently, he wanted to ask for love advice but that can't be true because Satoru himself is having trouble with that. The worst part is that he can not even stay mad at him when he offered to treat him, truly a terrifying person!

Anyways, while they were talking something bizarre happened. A robber was charging towards them with a knife but due to his tunnel vision and urgency at the time he did not see the trashcan in his way resulting in him ramming straight at it and falling at the hard concrete, the poor fool couldn't even get up on account of a conveniently placed banana peel. I think you can see where this is going. The cops finally arrived at the scene and apprehended the criminal.

Unknown location

{ERROR}

{Candidate#18913211821 Is Unavailable}

{Examining New Variables...}

{Calculating Options...}

{Executing Protocol EMERGENCY_SUMMON...}

{EMERGENCY_SUMMON Failed}

{Finding Alternative_Host...}

{World_205131651920 Is insufficient}

{Further Data Is Required}

{Expanding Reach...}

{Alternate_Host Found}

{All Requirements Met}

{Perform Necessary Changes}

{Execute Original Script}

Unlimited Blade Works

A Reality Marble

Shirou Emiya's soul made manifest overwriting the very rules and laws of Gaia herself. A world that is close to the concept of True Magic. In that very landscape, we find its bearer, fatally wounded after a colossal battle for the sake of the greater good. The man seems to have accepted his fate a long time ago and with a radiant smile is ready for the ending of his grand tale.

BUT

His journey has not yet ended it seems

{Command Start}

{Reviewing Achievements...}

{Analysis Complete}

{Confirmed}

{Due To The Wisdom Gathered From Numerous Life Experiences Extra Skill#18913211821:Sage acquisition successful}

{Continuing,Sage Interacting With Structural_Analysis Evolves To Unique Skill#18913211821:Great Sage}

{Crystal Icicles Detected, Cold Resistance Acquisition Successful}

{Survival of Cursed Fire At Childhood, Heat Resistance Acquisition Successful}

{Encounter with All The World's Evils noted, Curse Resistance Acquisition Successful}

{Acquisition Of Cold Resistance And Heat Resistance Results in Acquisition of Thermal Fluctuation Resistance}

{Several Stab Wounds Detected, Stab Resistance Acquisition Successful}

{Unwavering Will and Extreme Pain Tolerance analysed...Unique Skill:Mind Of Steel Acquisition Successful}

{Connection With Hero_Emiya found, All Skills Transferred Process Successful}

{Hero(Fake) title bestowed}

{History of Stealing Skills taken note of, Unique Skill#18913211821:Predator Acquisition...}

{ERROR}

{Skill Unsuitable}

{Updating...}

{ Unique Skill#18913211821:Predator is replaced with Unique Skill:Forgery To Better Reflect Host's Nature}

{Process Successful}

{Adapting Organ:Magical_Circuits To Element:Magicule...Process Successful}

{Magical_Circuits Quantity Increased}

{Magical_Circuits Purity Increased}

{Process Successful}

{Determining Form}

{ERROR}

{Unit#1221121514 Interfered}

{Process Overwritten}

{Perception Altered}

{Processing_Power Increased Dramatically}

{Performing Necessary Physical Changes}

{Process Successful}

{Starting Transfer...}

{Transfer Complete}

{Command End}

OMAKE

Dear Tamura,

Hey man, how's it been? A lot has happened after our last meeting. I finally found a girl that can tolerate me! That sounds a little depressing now that I think about it…well no use dwelling about it her name is Kanon, we met at elfcon (yes, I made that up don't judge me). She's a really sweet person if not a little too stubborn to deal with but I wouldn't trade her for the world. We are happily married at last with two children on the way, life has never been better! I can't imagine giving it up for anything in the world, sorry got to go she has finished preparing our dinner. I can't wait for you to meet her! I hope you are doing well as well

Sincerely, your senior

Satoru Mikami.

I can't say I'm satisfied with this it's too short but it was what I was able to write. This concludes the prologue I may or may not edit this more later down the story if I dislike it too much. Just please don't expect too much from me it's my first attempt to write something that is not school-related. I noticed no one else had done a fate/Tensei Shitara Slime Datta Ken with Shirou as the main protagonist beside Forest Dragon Slayer 2's take and decided to try it for fun. Please say if you don't like something about this I'm open to criticism.

P.S:Yes Shirou will be OP it's That Time I Got Reincarnated As A Slime what did you expect?