Fate x GOH
What if Shirou is not human, but instead a clone of the Jade Emperor, who happened to be in Japan to observe the Grail War under the Jade Emperor's order.
A Dante who developed differently from all his siblings, and used entirely different abilities due to Avalon's influence.
Dante a human clone of the King.
They're spare bodies and at the same time those who are supposed to inherit the Jade Emperor Power. However, one Clone disappeared one day during the supposed mission to observe the ritual human mage made in order to copy the Miracle of God.
The emperor just thinks of it as a shame and drops the subject.
Unknown to him this clone has lost all its memory due to a curse of Angra Mainyu and was raised by a human. However, after the Grail War Shirou was suddenly recruited by one of Mubong's judges to join GOH in Korea.
"Hm? Why do you come all the way here to recruit me to join that kind of tournament, in Korea no less?"
"We have interest in you who survived the Grail War."
"... Um, not sure how to tell you this, but I just survived thanks to my Servant and she died in the war."
"What if we tell you, that you may be able to meet that spirit again?"
"What?"
"Have you ever heard of Charyeok?"
Setting:
- In this world Servants still exist but in order to make conflict with Charyeok, let's just say they're a form manifestation of Charyeok. They're not even a fraction of the original strength of the Deity or spirit they copied from.
- Magecraft exists, and they're a separate system from Charyeok, but it is a dying art as humans lack the power to wield it
- Shirou is also slightly different, while he sucks at the magic he is a genius in Martial Arts. Shirou is able to use UBW, but he loses the common ability Dante shared in return. Such as Telekinesis and Energy Manipulation/Absorption, he will not able to use these until he awakens to Third Eyes.
- Also Shirou would later learn how to manifest Charyeok from a Judge, and his Charyeok is up to you.