Title: Sealing
AN: Inspired by Minato's sealing experiment while sleep-deprived incident in the excellent fic Déjà vu no Jutsu by Vixen_Tail on AO3 and FFnet
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Kakashi was never formally teach sealing. By the point he was kind of interested, he was also trying to regain his chakra control, shot down by having to integrate in his chakra system a body-part with another chakra and another elemental affinity.
So, what he knew about sealing tend to be less how to make a storage scroll for different volume of objects, and more if you put a kunai in a storage scroll which you put in an exploding tag (via a double-layered and slightly mirrored storage seal on the first scroll), after 27min where nothing happened, an small explosion (with green and blue smoke) would be followed by a tree (with steel leaf) shooting from the ground to become the tallest tree in Konoha (which isn't a small exploit given the Hashirama boosted trees the hidden village is known for).
The only conclusion the trio of sealing masters would come to will be that it was a good thing they experimented in the Forest of Death so an unsuspicious genin wouldn't jump in that tree and get cut by the absolutely normal looking but still steel leaf. (The genin who came to the training ground for their chunin exams and weren't already suspicious of everything totally deserve it clearly. A good ninja is a paranoid one.)
The Sandaime Hokage forbade further experiments since nobody could provide an explanation for even a single thing about the result (The only thing they agree was that there was only 5% chance this experiment could have create a hole in space-time, which, no, it isn't reassuring, nor an acceptable risk, honestly you're supposed to be responsible adults!). Also because when he ask what was the reason of the experiment in the first place, the reasons given amount to: "Why not?" "I was curious." "It look fun!"
