As a bright ray of light is shown unto y/n's closed eyes, he opened them and was suprised to see. Sandstone based structures.
Y/n:"eh? Where am i?"
???:"it seems you've awakened.."
Y/n turns his head around and sees enkidu.
Y/n:"e-enkidu? Is that really you?"
He giggled and lent his hand,y/n took it and stood up.
Enkidu:"it is me, also your dead..."
Y/n:"eh? Really?!"
Enkidu:"you died beacause of you using our noble phantasm."
Y/n:"yeah i remember, but i thought that wasn't supposed to happen?"
Enkidu:"well it must be beacause you weren't fully like me...."
Y/n:"explain.."
Enkidu:"ok then, for starters you were half human the other half were my powers such as age of babylon and our minor skills."
Y/n:"but doesn't explain why i died?"
Enkidu:"you died beacause you aren't fully the chains of heaven you were inly half of it the other half is human, and that causes your body to use too much amounts of energy and also it kills your own soul."
Y/n:"how bout you?"
Enkidu:"me? I can use my noble phantasm whenever i want beacause i am the chains of heaven basically made the same, a living weapon as the gods intended."
Y/n:"i see, i guess that explains it, also where am i?"
Enkidu:"my throne of heroes..."
Y/n:"how did i get here?"
Enkidu:"w-well, the throne of heroes detected your soul living that universe and decided to take you back, but it did not sense that you and I have different souls."
Y/n:"ok.... But why here in your throne of heroes?"
Enkidu:"it must beacause of our energy frequency since we have the same it thought we are the same person."
Y/n:"i see...."
Y/n then looked down and frowned
Enkidu:"don't frown y/n, in fact be happy..."
Y/n:"why?"
Enkidu:"I'll give you a choice...."
Enkidu then pulled out his hand and suddenly gold sparkles start to gather and form a grail.
Enkidu:"this is a lesser grail it contains absurd amounts of mana, also i got it from king gilgamesh and he said it was fine so...."
Y/n:"what's the choice?"
Enkidu:"you see when you are summoned here to the throne of heroes that would mean your a heroic spirit,and when we are summoned we have what's callled servant classes."
Y/n:"ok..."
Enkidu:"right now there are two servant classes for me, lancer and beserker. And right now your class is foreigner..."
Y/n:"foreigner?"
Enkidu:"your probably wondering what's a foreigner let me explain, it is defines it as a class for beings who overturn the base laws of our world. They are said to be individuals who have descended from superstition, those who have kept their purity in the heart of madness or who are swallowed by madness but then turn around and consume the madness in turn.Typically not Heroic Spirits, Foreigners are similar enough in nature to be classified in that way for the purposes of Chaldea. As foreign beings from outside of the world, they are typically bonded with an Outer God, the process of creating one being known as a complex process with a low chance of success. "
Y/n:" i see.... That's alot of info"
Enkidu:"yes, i asked fujimaru this info"
Y/n:"oh! Ok,but you said bonded with an outer god what does that mean?"
Enkidu:"well in this case, your bonded with me. So yeah..."
Enkidu and y/n then take a walk around talking about mastery of Enkidu's chains of heaven and age of babylon aswell as his other skills.
Enkidu:"now time for your choice, your first choice is stay here in the throne of heroes and become a servant permanently. The second one is i give you this lesser grail and you will use it as your core or heart, and with its help i believe you can return to the other universe with your servant class intact and your power would increase tenfold. "
Y/n:" what's the catch? "
Enkidu:" well for the first one, you could not return to that other universe and you would be forced into fighting possibly. In the holy grail wars. For the second one you cannot return here to this universe and you would be able to contact me and i will also not be able to contact you... "
Y/n then thought for awhile.
Y/n:" i think I'll choose the second one... "
Enkidu:" giggle* i figured, also once your back there your body would also become like mine, essentially a perfect twin of myself.... "
Y/n:"then I'm permanently you in that universe?"
Enkidu:"yes... Take care y/n and always be carefull alright."
As enkidu gave the grail to y/n and it started to glow with particles of gold light y/n then inserted this grail to where his heart is and suddenly a huge beam of energy fires unto y/n from above.
Y/n:"wait! Can i infinitely use your noble phantasm!"
Enkidu:"yes!...."
As the light disappeared so had y/n.
Enkidu:"be well, chains of heaven...."
Timeskip...
As y/n appears in the place where he fought sefar, he feels as if his body became lighter. He moves around looking at his arms his flowing green hair then sees a small pond and walks over.
Y/n:"i really do look like enkidu now, i mean i was before but something felt missing but now, im like a lerfect twin!"
He then notices that he was naked and had no genitalia.
Y/n:"wait a minute..... Am i? Genderless!"
Y/n was in a panic, finding out he had no genatalia but he quickly realized he's made of clay and so he uses his transfiguration skill to make.... You know....
Anyways he then uses it again to cover himself with a clothes.
Y/n:" right.... Now i need to return to kuoh..."
Immediately y/n flies away in the speed of mach 10 quickly reaching japan, once there he walks to ana and alice's residence and knocked.
______________________________________
Y/n
Servant class: foreigner
Skills.
Class skills :magic resistance
Personal skills:transfiguration, presence detection and perfect form.
Noble phantasms:
age of babylon
Enuma elish O' humans, lets us restrain the gods.
>the orginal Noble phantasm
of enkidu,now inherited by y/n where they transforms their own body into a Divine Construct, the chains of heaven.