The concept of this story is something I haven't seen, but the execution could use some work. There are a few grammatical errors, like when Kiritsugu says, I not old man, or the other ones, but that's minor. The major thing is that you have too much fluff in your story. If you broke down the chanting that they made, and just wrote that, it would make the story easier to read, and much better, along with saying just

'Kerry. Now that's a name I haven't heard in so long.'

I closed my eyes, almost like I was stopping tears from coming out.

That kind of structure removes any unnecessary fluff that you have in the story, just explaining enough for the readers to understand, but not so much that it feels like you are handholding them, and making them have no chance of understanding your story. Other than that, if you get the execution right, I will continue to read this story.

so at minimum it would be 100,000,000,000,000,000 or 1 quadrillion, that is a lot of money no mater what countries currency you're talking about.

good chapter also the market is Op but it's understandable also Shirou he's going laid alot isn't he

So, I guess for Shirou's Thaumaturgical Atributes:

"Sword" as an Origin and Element is a staple there, so that's a no brainer. But as a Atribute?
An even greater affinity to metal of all kinds, not only proyected one, but real metal, to shape as he sees fit? Innate combat potential? Something like "Knight of Owrner"?

"Wisdom/Blessing of The Wish Gods" from the Sakatsuki.
But I don't think it would be like the "Wish-Granting" of Illya. More like about true wishes themselves, like knowing/discerning them, and not just about "self-wishes" and "Do unknown non-trained magecraft just by trowing prana around!"

"Branch of sinning Witches" and "Charm and curse eater" From the Sajyou. . . A "Maybe" for the later.
BoSW sound like it would give a boost to the general, "low-level requirement but long-and-tedious procedure" branches of magecraft, especially Witchcraft and Formalcraft.
CaCE it's a "maybe". it sound around the things witches specializes; Charms and Curses. A protection against/ talent to detect and dispel those two things. . . or it could be very literal and "eat" and use Charms and Curses for "nourishment".
Maybe it's more for the "?" in the list of crests? If it's "Curses" then it links to the next one!

"Monte Cristo Dark Fire", as in like only the Black Fire from Edmond Dantes Noble Phantasm "Monte Cristo Mythologie: The King of the Cavern", or the whole package with the special magic circuit and crest?
Maybe it had to do with him surviving the cursed mud and fire of Angra Mainyu, and the dark flames are the closest thing to emulate a "blessing" for something that resembles the "Flames of Hell"?
If it does have to do something with Angra Mainyu, then I would put the "Charm and Curse Eater" with this one too.

"Pandora Miracle" from the Ainsworths. . . IDK A talent to give people "Hope" after horrible things happened? Or is another one that have to do with Angra Mainyu, as a herald of catastrophes, but also the bearer of hope? Maybe that the reason of his "Contradictions" on his origin.

"Fruits of Inheritance"
. . .
His real familly?
I got nothing.

I like the story but I seriously hate Genmu.
Your character is such an a*sh*l*. I understand that there's a need of funny and spices. But this guy is such a jackass.

Nice chapter

You know what'd be a really funny subversion of expectations, if Shirou gets confused as to what "lemons" means and was literally just handing out bags of lemons to girls he liked.

I will admit that you are good at making stories, having an asshole teach Shirou how to break and go from Death Wish idiot to 'competent' Magic Warrior is an interesting idea. Getting Rin involved was also interesting.

Though I won't force you or try to 'steer' you in any direction, I sort of expect his harem to be: Rin, Illya, Sakura, Saber, Rider.

Me párese justo como lo veo eld es arrolló de personajes es perfecto yo diría un poco de todo acción limon historia Román se etc a y no te olvides del humor especialmente entre Tohsaka stunderebe ilial la hermana posesiba

Nice chapter, I've been waiting for an update for awhile and here it is. I really hope the next one
comes out before half a year passes again.

id be fine or even happy if shirou end up op through a lot of hard work and good genetics also his stuff is so awesome poggers

Good. But too slow..

Looking forward to the next chapter! (Not a lot of fanfictions involve Illyasviel in the harem... so I'm looking forward to this!)

Isn’t ascension to heroic spirit a very hard nearly impossible task? I somehow got vibe you will make Shirou and possibly more ascent too. Not that I’m complaining of course.

This is very complex huh? Haha.