Not me staying up at night after getting dragged back into the Naruto fandom again just thinking about the fact that in order for them to have taught or even have anything written down about the Uzumaki Reaper Death Seal, an Uzumaki would have to somehow survive summoning the Reaper/Shinigami in the first place.
The same summoning that costs your soul.
Like how would that be possible first try?
I know their life force is the strongest amongst any of the clans but to survive the Shinigami a.k.a. the GOD OF DEATH?!
Now I'm stuck thinking about how a situation where someone tries to use the seal on an Uzumaki would go. Would they even react to it? Or would an Uzumaki just be like "Oh, hi Shinigami-san! Haven't seen you in a while!" then somehow cancel the jutsu or something more weird? Because these people literally had masks that can help you unseal something sealed in the Shinigami's stomach (along with other masks that can do who knows what) and just gave them to Konoha so I am honestly scared of what they might be capable of. I honestly would have loved more explanation when it came to this seal and the Uzumaki in general. Even if it came in some sort of gag scene where someone tries to do the seal on Naruto but the Shinigami can't take his soul because Naruto is an Uzumaki and the Shinigami is basically like a summoning animal to them.