Satoru Ryomen POV
I turn back to stare at my opponent "now then where were we?"
"I believe we were just about begin our feast," the scythe user replied launching her snake like hair towards me.
I willingly let my arms and legs get captured with a grin I clutched on to them tightly "this is some nice hair you got here would be a shame to cut them off," I complemented with a shit eating smile "oh wait Cleave!"
The spell quickly began to adjust itself to the servant's level of mana and immediately a series of invisible slashes cut off all her hair.
The servant screamed "how dare you!" she roared her eyes suddenly glowing to an intense shade of violet.
My eyes widen briefly feeling my body getting heavy and almost turning to stone.
I quickly began to use the Reverse Mana Flow technique in a cycle revitalizing my body back to it's normal state.
Those eyes of hers and with her hair technique from earlier there's only one such servant who could fit this description "so you must be Medusa then? Heh well I can't have you cheat with those eyes of yours" I said placing a palm over my eyes then with a small use of Cleave I destroyed my own eyes.
Mashu and Olga's eyes widen seeing the massive leaks of blood escaping where my eyes were "senpai!" Mashu shouted.
Olga reeled back from where she was in horror her voice breaking "you-you just blinded yourself! What the hell are you doing!?"
I gave them a bloody grin the darkness of blindness rushing over me "oh calm your tits down I don't need them right now," I shouted back.
With my innate sensing technique I've developed I still know the exact position of where Medusa was "there now your eyes can't work on me, I could have kept using my Reverse Mana Flow technique but that would just constantly drain me of my mana so this will have to do for now," I explained.
Within my mind's eye I could metaphorically see everyone's positions, mana color, and even the even the rush of Medusa's fury as she charged towards me.
Her chain-bound scythe carved through the air with a whistle.
"Too slow," I ducked under her attack and dashed towards her location my fist pulled back.
The moment her presence filled my blind spot, the mana in my arm crackled and collapsed inward on itself.
BANG!
Another Black Flash detonated against her abdomen.
The space itself shrieked as it folded and snapped back into place sending Medusa hurtling through the air like a cannonball.
The city block quaked with the impact rubble raining down.
"Grrhh!" her guttural snarl echoed from the crater she slammed into.
I exhaled shaking the left-over blood from my ruined eyes a smile spreading wider across my face "come on, Medusa don't tell me that's all such an appetizer wasn't even enough to fill my teeth."
The air went dead cold.
Chains snapped and whirled through the dust cloud a dozen, a hundred, all lashing toward me like the fangs of a hydra.
"This trick again? Heh consecutive Dismantle," I murmured.
Condensing invisible slashes shredded each chain after chain in an instant.
Steel links shattered into nothingness screaming as they dissolved into sparks.
Medusa emerged from the cloud cloak shredded, her scythe whirling in vicious swipes.
Each strike was faster with every swing she unleashed.
"Better," I said, smiling through the blood "but still not enough to satisfy my stomach."
I stepped forward.
One Black Flash from my heel.
Another from my knee.
A third igniting from my elbow.
Every movement was punctuated with a thunderclap of warped space.
Her scythe swung at my neck a clean slash from Dismantle deflected it off trajectory forcing her guard open.
"So obvious," I called out
My fist slammed into her stomach as the cloak of reinforcement around my arm shifted into the color of a Black Flash!
The street ruptured like glass beneath us.
Medusa gagged blood spilling from her lips her body flung upward like a ragdoll.
I followed her into the sky with a single bound.
"Dismantle."
A wave of slashes cut the air shattering her chains mid-summon before they could even form.
"Black Flash!"
Her jaw snapped sideways with enough force to rattle the heavens the explosion of warped mana tore the clouds apart, a jagged scar splitting the sky.
Medusa reared her head back in pain, but I wouldn't let her recover.
I kicked through the air and buried my knee into her rib "Black Flash!'
Her scream was ripped away by the collapsing air.
Her chains shot out desperately a spiderweb of killing intent trying to ensnare me midair.
"Pathetic," my hand flicked unleashing another Dismantle.
The invisible slashes devoured her steel mid-flight each link dissolving before it could touch me.
"You're officially boring me woman," I said as a dull look slipped over my face again.
I kicked the air again appearing above her.
My fists move unleashing a chain of punches upon the gorgon as I repeatedly triggered Black Flash after Black Flash.
Every blow was like a gunshot of warped space her body convulsed with each strike.
She snarled whipping her scythe upward in a desperate attempt to attack back.
The blade aimed itself for my throat.
I tilted my head slightly as a smirk cut across my face "oh so now the prey is attempting to fight back?" I questioned.
My palm flicked with another dismantle.
The scythe screamed as its trajectory was moved off-course, the weapon let out small sparks from the invisible cut.
Before she could recover my heel slammed down.
Black Flash again!
The atmosphere ruptured as the flash sent Medusa plummeting back towards the earth her impact cratering the street below.
I descended after her like a falling star.
Her cloak was gone, body battered, and her hair shredded to the point of baldness.
"I'll tear you apart for this...!" she hissed voice guttural with rage.
I let out a loud yawn "if you were going to do that then how come I've been able to land so many shots on you? While you haven't even touched me once it's almost unfair really, I was so excited but then"
My grin dropped flat. "...you disappointed me just like that guy from earlier."
The weight of my words pressed through the silence like a guillotine.
Medusa snarled, her violet eyes glowing with lethal brilliance "you dare mock me, human?! My eyes will turn your very soul into stone!"
Her gaze locked onto me.
But instead of panic I smirked "oh that's right, you just reminded me of something," with a swoosh I was in her guard.
Both of my hands clamped down against her face fingers digging into her skull like a vice.
Her eyes widened but it's too late.
"Don't worry, I'll put these to much better use than you ever did."
With a savage wrench I tore her Mystic Eyes straight from their sockets.
Medusa dropped to the ground while letting out a loud howled scream of agony.
Blood came flowing from her now empty eye sockets like a steady river.
Mashu gasped in horror, Olga nearly retched, and even Romani's voice crackled through the comm-watch with raw disbelief "o-oh god I think I am going to be sick bwahh," he proceeded to throw up anyways.
I took both eyes carefully inserting them into my own empty sockets and then used Reverse Mana Flow.
Normally Reverse Mana Flow was used to heal via using the soul's blueprint but this was different these weren't just eyes they were Mystic Eyes that belonged to a gorgon.
I needed to integrate them carefully without letting their inherent curse destabilizing me.
Right now, my body was starting to reject them the raw magical essence of the eyes screamed against my own mana circuits trying to assert its will.
I clenched my teeth, forcing the command deeper.
"Undo the damage, align the flow, and rewrite the blueprint to match my own," I whispered under my breath.
I could feel her eyes begin to merge with my own energy channels.
Normally using Reverse Mana Flow on a person meant accessing the person's soul and force the body to match the blueprint of what the soul looked like.
Souls for humans take on the shape of their body.
If they have an arm in their spiritual form, then the body will be forced to regrow that limb simple as that.
However what I had to do right now was synchronize the foreign mana patterns with my own.
I threaded her eyes into the architecture of my body and let them accept me as their new host rather than simply resisting.
Just like that the Reverse Mana Flow began its work.
I forced the natural state of the cells and the mana to reassert themselves according to their original blueprint, but I wasn't restoring Medusa's body I was rewriting her eyes to function through mine.
I felt the intricate layers of her Mystic Eyes trying to assert dominance trying to warp my perception, but I slid my own mana in like water through a dam coaxing the flow to harmonize instead of clash.
Every pulse of mana I sent back into the eyes forced them to accept my signature to remodel themselves as extensions of my own magical circuitry.
It wasn't painless though.
I felt the backlash of her power the remnant powers of her eyes clawed at my neural circuits but Reverse Mana Flow stabilized it forcing the injury and corruption to "rewind," forcing the eyes themselves to reconfigure along my own blueprint.
Bit by bit her violent colored mystic eyes shifted into a bright glowing blue that seemed far more beautiful the Medusa's violet ones.
Finally, the integration was complete I opened my new eyes.
The violet haze that had threatened to petrify and corrupt every fiber of my being was gone.
In its place my vision was crisp, brilliant and unnaturally sharp I could see the currents of mana all around me, the slight tremor in Medusa's remaining limbs, and even the particles of dust.
I blinked once and smirked "there now this is much better," I muttered wiping the streak of blood from my cheek.
Medusa hissed from the ground one hand trembling as she tried to rise only to collapse, "y-you... you took my eyes....how-how is that possible?!"
I tilted my head "I could tell you but that information would be useless to a dead woman," I replied before kneeling down to face her up close "for letting me have your eyes...I'll mercifully ask if you have any last words?" I asked in a much softer tone.
Medusa's chest heaved as she looked up at me her remaining strength barely keeping her upright "there was...someone I wanted to protect and save but I failed," she paused "she died once Saber went on her rampage... and I couldn't stop it," Medusa choked out her voice trembling with both pain and bitterness "the grail is at the top of where Ryuudou Temple is," she revealed pointing towards it's general location "cough..cough...d-do what you will with that information," she concluded as particles of mana left her body until it vanished leaving only her scythe.
With my new mystic eyes, I could see the immense mystery that was imbued in the weapon "so the noble phantasm was never hers," I muttered grabbing the scythe where I could see my new eyes from it's reflection.
Beautiful glowing blue eyes greeted me looking nothing like Medusa's former eyes.
I am able to perceive so much more of the world with these "I think I'll call rename them as the Six-Eyes seems quite fitting," I muttered.
-End of Chapter Four-
So, to add on from the previous chapter regarding some things to the MC's capability/approach to magecraft.
My thought process was that since Illya in the Prillyaverse didn't logically use anything to make herself fly but only her imagination I thought maybe the mc could do the same. I mean flight from what I've been told is something close to a miracle. So the thought was if a miracle could be replicated with imagination then can't imagination allow someone to replicate something close to a fragment of true magic like heavens feel?
In summary Imagination/Creative Mindset = Close to Miracles = therefore because a spell is being fueled from the imagination it must be powerful
Of course it wasn't until someone pointed that it's because of Illya's wishing craft ability that she's able to fly but by then I had already written the chapters.
But this is a fanfic so were just going to ignore the whole Illya wishing thing.
Anyways I know my MC has been doing a lot of one shotting so expect some struggling when it comes to the eventual combat time against Salter.
Revealed Technique/Trait List (Update)
Dismantle: A normal default ranged slashing attack
Cleave: A slashing attack that adjusts itself depending on the target's toughness and mana energy level to cut them down in one fell swoop. This spell first require hand contact though.
Reverse Mana Flow: is Satoru's special healing technique where he rewinds the flow of magical energy inside a person's body to reverse their injuries. Instead of just speeding up healing, it forces the soul/body to "undo" damage by restoring the original blueprint of their cells and mana flow. This lets him quickly heal wounds even regenerating limbs and fix magical damage by making the body return to how it was before getting hurt.
Reinforcement: Although it is the basic of techniques the way Satoru uses it seems to be way different from normal magi. We've seen him match a servant like the corrupted Assassin in both sight and strength using his method of reinforcement
Innate Sensing Technique: Satoru possess an innate sensing technique that lets see the position, emotion, and color of anyone's mana.
Mystic Eyes: The Six Eyes: After tearing out Medusa's Mystic Eyes and reconstructing them through Reverse Mana Flow Satoru transformed them into something entirely new. His new eyes allow him to perceive the flow of prana and Mystery in perfect detail down to the smallest fracture in reality. Reduce his mana wasting to nearly zero and directly see the "weight" of a spell's Mystery how much belief, secrecy, or faith it holds and even see how it works to then reconstruct. A massive upgrade from how Satoru originally did so with his analysis spell.