(I listened to this on loop writing the chap. Fate Stay Night unlimited blade works Archers theme. Link, https://youtu.be/SN-q5QHd6_A)
Pushing Rho Aias outwards, Rei forced the 4 assailants to retreat as he summoned countless noble phantasms mid-air. Shooting them towards the 4, Rei also retreated a decent amount of distance.
'Mid Sovereign, Peak Sovereign, Peak Sovereign, Low Sovereign. They're either underestimating me again, or these guys are hiding something.' Rei thought as he looked at the four people in front of him. All of them where hidden with masks and cloaks.
"Hn, Since you four are obviously sovereign level I wont hold back too much." Rei mocked to try disturb their focus but they didn't waver.
"Hmm figures, 6th Gate OPEN!!" Rei said stepping down hard causing the ground to crack.
"Bankai - Nanatsu no Tengoku!" Rei then shouted as 14 wings expanded out from his back. Snapping his fingers, Rei turned them into 7 different swords each hit from them would cause a decrease the areas for strength, speed, defence, stamina. Rei did this utilizing his concept of seals.
The swords hummed with neon red runes and seals on the blades. Using his left hand to control the blades, Rei summoned the base form of Kyoki on his right hand. Rushing towards the four, Rei shocked them with his speed.
Swing Kyoki down on one of the counter guardians. Rei turned his body as he kicked another one in the chest. Using the 7 swords he controlled them to attack the other two.
"I'll have you know, numbers don't work on me." Rei said as he dashed towards them once more.
"8th gate OPEN!!" Rei suddenly increasing his speed more. Kicking out on the unsuspecting guardian, Rei demolished his upper body causing blood to rain down.
Reappearing next to another guardian, Rei bisected the person before looking at the last two.
"2 down, 2 remain." Rei said pointing the swords at them from all directions.
"Hn so what, we're distractions anyways." They both said while Rei pierced their bodies.
"Kuah!" They threw up blood as Rei looked at the masses of lights gathering.
"Hou~ Each one of them is summoning a servant. You guys treat me so well." Rei said sarcastically.
"Hmph, you'll die easily faced with this many heroic spirits." One of them said arrogantly.
"Hou hou~ I was going to kill you but I'll let you watch. I do best in 1 vs army situations after all." Rei said ominously as he teleported them to a cliff.
Untracing, Tengoku and Kyoki. Rei pointed his palms away from him. From the palms, dense magic circles appeared as they started to stack up. Slowly bringing his palms together, Lightning flashed around him.
"I am the forge of origin..."
Rei chanted as he started of use his own created magic.
"All weapons come from me..."
A large seal spread out from his feet easily covering the entire cliff. The counter guardians became worried as they felt the dense mana signals coming from them.
"Past, present and future..."
A dense amount of circuits extended towards the sky grabbing everyone's attention.
"All weapons belong to me..."
Portals started to open up where ever the circuits touched.
"Come at my beckoning....."
"ARMAGEDDON!!!!!"
Rei shouted as the portal exploded open. Countless weapons could be seen as each and everyone of them are real noble phantasms. Each one glowed an ominous red signalling them surpassing their limit and becoming a broken one time use weapon of mass destruction.
"HAAAA!!!!" Rei shouted as the weapons shot out at over mach 15 speeds(around 5km per second correct me if I'm wrong). Countless explosions rang out for a good 5 minutes before it died down. Each of the explosions the size of a few houses.
Looking at the devastation he cause, Rei could see the majority of the forest carpet bombed by him. There were hardly any remaining enemies as the surviving ones looked around at the landscape of fire and destruction. Truly a scene of Armageddon.
"Now then, does your magic association still want to see what else I can do? Or does Gaia still want my head? She basically forced me to carpet bomb this place by sending you guys and the association at me, so if anything it's her fault no?" Rei said with a smile not bothering about the massacre he just did. In his defence, they we're enemies who didn't mind human experimentation and wanted to dissect his and Eve's bodies to study.
The two remaining counter guardians could only shiver in fear as they saw how effortlessly it was for Rei to slaughter their 'army'.
"Now then bye bye~" Rei said killing them finally.
Looking at towards the city, Rei could feel that Eve is battling it out using Senbonzakura and her god slaying abilities.
His attention was drawn back when he could see several more servants drop down and surround him. Rei looked around as he saw he was surrounded.
"Troublesome..." Rei said he traced out Kyoki.
The first row of servants attacked him instantly the moment he summoned out Kyoki. Using observation haki, Rei managed to avoid the hits by twisting his body balancing on one finger.
"Unveil my dagger, blend in shadow...."
Rei started to chant once more causing the group of servants to be on edge because they saw what happened earlier.
Still balancing on one finger, Rei kicked both his legs out making two servants fall back while the others tried to attack him.
"Crescent moon shine, smile in slaughter...."
Pushing up with his finger, Rei avoided the attacks before coating his fist in tremors and punched down causing the ground to smash apart. This stumbled the close ranged servants while the long-range started to fire arrows at him. Turning certain parts of his body into mist he avoided all the noble phantasms that he didn't know about.
"Shojun(Ascend) : Gekko Karitoriki(Moonlit Reaper)"
Rei said as he domain spread outwards causing the servants to believe that it's a reality marble.
The moon was bright was mist flowed everywhere in the domain. Rei could be seen as two floating crimson eyes while the daggers in his hands shone with a similar light. Applying the seal of mana drain, Rei teleported into the shadow of one servant and cut his head.
Before they could reacted, Rei was already somewhere else and killed another servant. But they weren't heroic spirits for nothing, they quickly formed groups making sure that they could see their shadows and cover each others backs.
"Just because you took out the shadow doesn't mean I can't use speed." Rei's voice rang out as streaks of red and sparks could be seen while Rei continued to kill, some managed to parry for a moment before death while others never even got the chance.
A large group of 7 servants let their guard down slightly for a moment which Rei exploited and teleported in between all of them surprising them. Without even saying anything, Rei twisted his body cutting off all their heads in one swift motion.
Stopping in the middle of all the servants, Rei gathered mana in his palms, which the servants could feel, and pushed downwards causing large spears to shoot out of the grounds near the heroic spirits via the seals he set up while teleporting around the space. The spears skewered most of the servants while some managed to survive.
Tracing out Gáe Bolg, Rei charged it up with energy as he flung the spear upwards which then paused mid-air and pointed to a servant.
"True Gáe Bolg!!" Rei said as the spear shot forwards in a streak of red. The servant tried to dodge but the spear would never miss. Piercing the servant's heart, the spear continued to pierce 20 servants hearts before returning to Rei's hand. Throwing up the spear high up, Rei drawed everyone's attention to the spear while he crouched low cutting multiple servant in half before the spear returned it self back into unlimited blade works. Rei looked around and saw that no he could see was left alive.
Undoing his domain, Rei walked away when he then suddenly round house kicked an open space soon revealing the body of an assassin missing his upper body which Rei had kicked.
"Just because I can't see you doesn't mean I can't feel your presence ." Rei said as he flashed near the 3 hidden assassins and teared them in half with his pure physical strength. Spreading out his haki, he made sure no one was left out before leaving.
Walking back to the Einzbern mansion, Rei could see Berserker on his 4th life out of 12, while Gilgamesh is having troubles since Berserker could fight better without worrying about his master.
"Berserker, want me to help?" Rei asked even though he knew the answer.
Berserker only shook his head before dashing toward Gilgamesh.
Rei shrugged as he sat down next to Illya who was in his barrier.