FGO's forge god EMIYA (not a story but an inspired idea for one)

So, I read two different fanfics one called "The new god of the forge" by ahmadnazem which is shirou emiya becoming Hephaestus in the Percy Jackson universe during the Greek times, and "what happens when you summon Shirou Emiya in chaldea" by AccelBreaker on fanfiction.net but has a reprint here on wattpad which contains just random moments and adventures shirou emiya has in chaldea while being the dominant personality in the vessel of sengo muramasa.
So, I thought what would happen if Hephaestus were summoned to chaldea and uses Shirou Emiya as his vessel and has adventures and encounters like in AccelBreaker's story.