Emiya Harry Challenge
Zelretch "Old Man of Jewels" is known throughout multiverse as harbringer of chaos, person willing to go to great lengths merely for his own amusement. What if one day he decided to replace one savior with another? Gone Shirou Emiya now in his place saving Moonlit World is Emiya Harry, adoptive son of Magus Killer, and only survivor of Fuyuki Fire.
Requirements:
Zelretch takes 7 year old Harry Potter from his world and places him in Nasuverse, to be found by Kiritsugu Emiya.
Avalon healed all scars, that were left from Dursleys, on Harry's body as well as repaired his eyesight.
Kiritsugu adopts Harry.
Kiritsugu properly trains Harry both in magecraft and in Magus Killer skills, and before his death gives him means to obtain materials (books and reagents) for further studies.
Harry is a prodigious mage (as good as if not better as Rin Toshaka)
Harry has 40-50 circuits (how his core was replaced by circuits is up to author), his origin is optional but his element must be Average One (can use all 5 elements)
Harry\Harem
Optional:
Kiritsugu tranfers his Crest to Harry, allowing him to use time-spells (for example Time Alter)
Shirou also gets adopted
Harry by the end of Holy Grail War obtaining True Magic
Forbidden:
Slash Pairing
Over the top hero complex in Harry
Harry returning to his Potterverse after Holy Grail War
Wrong-boy-who-lived
Alive Potters
