The idea was simple, so was the answer, but mastering the Flying thunder god technique in under ten days, even if it was only Tobirama's version, would be hard. That was, of course, not mentioning the process of even being able to use it… The thing that made it tricky, was that the design was multidimensional, in Tobirama's mark, the first dimension, also known as the surface dimension, was a link and primer, while the second dimension was the actual technique.
