Prediction: I want to say that double sasuke should lose, but maybe he will get lucky and kill him once or twice, but ultimately has to run away with a few scratches? So with two deaths, Kakuzu will lose two of his chakra hearts?

this would making running away and escaping easier because if you don't even know where you will teleport to, how would others chase after you?

Let's think, if you remove his connections and ostracise our MC, isn't that enough reason to rebel and turn traitor? He already has the forbidden techniques, and if you don't reward him and punish him, he'll turn traitor. Do you want him to freely teach the enemies of the Leaf the techniques? Also, don't forget everyone, he should have gained 20% after killing Han, so he's a legit kage-level ninja now. He can easily escape the village if he turns traitor, plus can't he use FTG/Flying Thunder God? Good luck catching someone without shackles, his family is already disassociating with him lul!

hmm wasn't the original purpose of ninjutsu something from the nin-shu religion where they shared chakra to understand each other?

that's cool.

thanks for the synopsis :D

I'd say just do what you feel is acceptable and stick to it :D

I feel 2x every times is cannon, but maybe you can use tier modifiers or soft caps? Maybe each additional boost is less effective? 5 Boosts should reach 32x, but maybe you can say 2x -> 1.98x -> 1.96x -> 1.94x -> 1.92; so after 5 boosts it's 27x instead of 32x?

is this the wrong fanfic? I am confused why it's one piece now? Or did I remember the last chapter wrongly?

uhm, Kitamari / Marin_Kitawaga, they have 10 stories listed on their patreon... Considering your accusation, does this mean the other 9 stories are also stolen from others too?

I read the dozen main comments so far, to summarize what people say: reaction speed. People keep mentioning foundation, like how Naruto's best with Rasengan. It's because he spends so much time practicing with it as it's his primary combat method, especially with shadow clones. I also want to mention that the it's cannon that his seal is enhanced, it literally is three lines instead of a single long line. So the creation process is probably easier, so he can make many FTG tools/kunai. So I suspect that it's a difference in the seal that slows Tobirama down, and not because his lesser sensing ability? I think Tobirama's FTG uses his own body/talent as a crutch while minato used his knowledge to make FTG easier to use and ended up with a supperior FTG?

Beach means easy fish resource while mountain means easy fresh water resource... How about a mountain that's next to a beach? You already mentioned crabs and natural hot springs... I think you should do both!

Physique, while others say it means physical, even if I don't speak spanish, phenetically and sounding it out, it does sound like physical, but that's too similar to taijutsu? So I am going to assume this means physique or indirectly the chakra quality?

I didn't want to say horse-shoes when I already wrote down rabbit feet, so I picked the next best thing. But I was curious, as I didn't know why it was lucky either. So, I looked it up, both Celtic traditions and Norse mythology have associate acorns with good luck. Such as protecting homes from thunder, it's fertility and abundance, and I think it's more sacred than lucky, but the wisdom of an old oak tree, indirectly, I feel sacredness brings luck.

sounds like a good plan

the glyph for a and o look very similar

so rather than what he needed unknowingly, it only gives what he specifically desired?

German for "I love you" according to Google Translate.

Silver hair... Maybe you can say that your father or mother was one of his lab rats, he wanted to reincarnate himself, but the fuinjutsu and jutsushiki (cursed technique) partially failed, and you instead are slowly inheriting his chakra, it's nature, and some knowledge? If you explain anything, that's the most sound, and that's if you explain anything... I mean, he invented bringing back the dead, why wouldn't he experimented to bring himself back? Maybe even suggest Tobirama even suspected Madara Uchiha to have done the same with Izanagi using his Eternal Mangekyo Sharingan, so he experimented the same? The only problem would be if someone reawakens Tobirama from the pure land and calls him out XD. Response: Tobirama then removed his memories, so that if that failed, he wouldn't reveal this even after the grave. Okay, maybe I am just having fun thinking of ideas.

How much is taken lul? Even 1% of nine-tails would be lots and lots of power... That's like equivalent to 11% of one-tails' power?