((Note: 50 chapters?! Now, is it Season 4 of Shield Hero?! I will never catch a break. Anyway, Let's do this!))

No POV

Gilgamesh: This mongrel is being difficult. I believe he might be worthy to rule his own kingdom... just like us.

Semiramis: You're right.

Semiramis(Mind): I can't believe it. My husband...

Semiramis then remembered her husband... her FIRST husband, Onnes.

Semiramis(Mind): My first husband, Onnes...has been reincarnated. However, he does not know me, does he?

((Note: One thing I know about reincarnation is that you don't carry your life's memories to your new body. So, my OC doesn't know that his past life was involved with Semiramis.))

Blaze then turned into her human form. The three of them stopped hugging as Blaze & Mordred looked at Khiry & they were surprised to see...

Mordred: Father?

Khiry then looked at his hands to find out that he was Artoria Alter. Corrupted by Angra Mainyu, Artoria Alter is vastly different from her normal self. She is also called Black Saber. The results of her alteration is not only within Artoria Alter's interior but also extends to her outward appearance. The color of her skin becomes pale, and the pupil of her eyes that were at first concealed behind a black visor during the moment of her summoning becomes golden from her original green eye color as well. Because the armor she wears was dyed jet black and grew in weight due to changing into a heavier armor, its power has increased more than normally. 

Khiry(Artoria Alter): My body... I am feeling the corruption within this form. 

Blaze then put her hand on Khiry's(Artoria Alter's) shoulder as he(she) looked at her.

Blaze: I will do whatever I can to keep you sane.

Khiry(Artoria Alter) then nodded as he(she) turned to Mordred.

Khiry(Artoria Alter): Tell Fran that I am sorry that I am going to break my promise to her.

Mordred: What are you, crazy?

Khiry(Artoria Alter): I don't have a choice. We need to end this.

Mordred didn't want Khiry to break his promise, but if he can finish the job, some promises are meant to be broken.

Mordred: Don't die...

Khiry(Artoria Alter) then nodded. He(She) then looked at Gilgamesh & Semiramis. Gilgamesh then headed out as Khiry(Artoria Alter), Mordred, & Blaze dashed toward Semiramis.

Semiramis: How sad.

Khiry(Artoria Alter) & Blaze then made her look by going for an attack, but moved out of the way. Semiramis then looked to see Mordred strike down on her, causing her to bleed. She then started to pant a bit as she looked at where we were headed.

Mordred: Please hurry.

Mordred then rushes toward an exit.

Meanwhile

Gilgamesh is waiting at the top for Khiry(Artoria Alter) & Blaze. They then made it.

Gilgamesh: You do know that I have faced Saber before.

Khiry then changes back to his normal self.

Khiry: It's time to end this.

Khiry then summoned his daggers, Unheard Agony in his right hand & Leaf Leek in his left hand. He then tried to hit Gilgamesh as both clashed one more time. However, somewhere, within Khiry's magical force................. Chaos force is about to break free. Khiry then felt it & backed away.

Khiry(Mind): What's going on?

Khiry's right eye started to turn black with a red sin symbol of Satan. Satan then felt the connection.

Satan: Our lord's Chao force & Naofumi's shield of Wraith are shown. If this keeps up...

Uriel(Telepathy): Lord! Please focus. Control it!

Khiry: I'm trying!

Gilgamesh: It is over, mongrel.

Gilgamesh then started his Noble Phantasm as he then bring out Ea. Sword of Rupture, Ea (乖離剣・エア, Kairi-ken - Ea?) is the most powerful Noble Phantasm contained in the Gate of Babylon and the pinnacle of all those used by Servants. Unlike all of his other nameless weapons that were able to be passed on to other wielders throughout history, it is a sword only Gilgamesh possesses, a unique existence that can only be possessed by him, that is suited only for a ruler's use and makes him transcendent. It has an abnormal shape that doesn't match what would normally be classified as something specialized like a sword. It is something that was born before the appearance of the concept that the world calls a "sword", so it is not something that can truly be called a sword or have the shape of any known blade. While it has a grip, handguard, and is the same length as a longsword, the section that should contain a blade deviates from the normal form of an edged weapon. The "blade" itself and the tip of the sword, spun in a spiral shape, are dull. It has the shape of a cylindrical, drill-shaped pillar made up of three independently rotating segments engraved with crimson lettering that spin slowly in an alternating direction like querns, the middle segment spinning clockwise and the top and bottom segments spinning counterclockwise. The drill design was modeled after bedrock excavators used to drill underwater tunnels. While Ea is categorized as a sword, its way of being is closer to a wand. Its three sections respectively represent the heavens, the earth, and the underworld. It exemplifies the world's way of being by having each one of them rotate in opposite directions. The "cosmos" is thus represented by matching all three of these representations. Everything together represents the universe. Unlike most other Noble Phantasms, the ability of the sword has its unique name instead of simply chanting "Ea" to use its function as a Noble Phantasm. The attack, Enuma Elish: The Star of Creation That Split Heaven and Earth (天地乖離す開闢の星エヌマ・エリシュ, Tenchi Kairisu Kaibyaku no HoshiEnuma Erishu?), signifies the overloaded state under which it releases its maximum output. While nominally listed as the Noble Phantasm in his status, Ea is the actual Noble Phantasm. Originally, it had the Authority of nation-building. Borne of the winds drawn unto the revolution of the three cylinders of Ea, a spatial severance is formed by use of the Sword of Separation. Compressed and intertwined stratifications of wind become a virtual dislocation of space-time, annihilating any who would stand in opposition. Aside from holding an elimination rank "Armor Class" statistic of a sufficient magnitude to Anti-Purge Defense, or enacting mutual negation via a counterattack that inflicts the same order of damage, the damage rendered cannot be defended against.

Gilgamesh: This sword "knows the truth" of the world where it once existed. Not only is it "The Sword That Cut the World Apart", he calls it "something that knows the hellish planet before genesis." Not even you can survive.

Gilgamesh then launched a beam attack at Khiry while controlling the level of power in Ea. Khiry then took the attack, but during the attack, Khiry opened his eyes to the sin symbol, causing him to be embodied with Satan's power.

((Note: Please ignore the title. The symbol is the one I was looking for.))

Congratulations, you have unlocked the Avenger Class.

Congratulations, you have 1 out of 18 Avenger Servants.

The fire came from the ground & started to overpower the attack from Gilgamesh.

Gilgamesh: WHAT?!

Something went towards Gilgamesh as a demonic claw grabbed his throat. It was Khiry, being surrounded by hell-fire. 

Khiry: I'm going to take you to hell with me!

Gilgamesh then stands his down, causing Khiry to let go. Gilgamesh then saw that the flame went from normal to black.

((Interesting fact about Hell-fire: The color of the flames varies, but may be black, blue, white, red, or the normal shades of fire, although probably in some way noticeably unusual.))

Gilgamesh: What are you?

Khiry(Demonic voice): The embodiment of Chaos.

Khiry then constructs chains from his own hellfire & throws them at Gilgamesh. He then broke 2 of them, but they wrapped around him. Khiry then slings him to a wall & another wall before swinging him in the air, but Gilgamesh then cuts the chains, causing him to be in the air. He was floating, but then heard the skies cackle with a red flash. This confused him as he looked up. The skies are blackened, red lightning shown, the sea of blood, & hundred of red emissive eyes are looking at them, As if reality has wrapped. It is not just Gilgamesh who is seeing this; Blaze, Glass, L'Arc, Thersa, Naoumi, Raphtalia, Filo, Melty, and even the queen are surprised because she wasn't even drained of their mana.

Raphttalia: Naofumi-sama. What is happening?

Naofumi then looked at the bar.

Khiry's Demonic Sin of Wraith Empowerment: 100%

Fran: No...

Atalanta: What's wrong?

Fran: He broke his promise... 

Atalanta: You mean the promise you forced him to make.

Fran: I saw him... as the devil... stronger than Deities themselves.

Atalanta went wide-eyed as they saw Astolfo land with Mordred on the Hippogriff. Gilgamesh is impressed. He then lifted Ea in the air, causing the reality to be in the cosmic skies with stars. The two realities are clashing with one another.

Khiry(Demonic Voice): THE POWER OF THE COSMIC CANNOT DISGUISE YOUR GREEDINESS!

Gilgamesh: That is the pot calling the kettle black.

Khiry & Gilgamesh then started to clash as Gilgamesh hit Khiry three times with Ea. Khiry then blew hellfire from his mouth, causing Gilgamesh to dodge before hitting him upward. Gilgamesh then charged toward him, but Khiry delivered a sledgehammer, bringing him down. Gilgamesh then stops his fall & flies higher. He then charged his level to the maximum as he pointed at Khiry. Khiry then flies fast toward Gilgamesh with a demon arm & chao energy in his hand. As he got close, the collision caused an explosion that threatened the skies around the planet itself.

((DONE! KHIRY HAS UNLOCKED HIS AVENGER FORM: THE DEMONIC SIN OF CHAOS. DID HE SURVIVE THE EXPLOSION? IS THERE A COUNTER? DOES