Alexdmercer
I think this only has upsides. He’s already squeezed the Senju library of their jutsus. Nobody really knows what kind of hidden secrets and jutsus Kiri has. Beyond the hydrification technique, what else have they mastered? Plus…think of all the bloodlines available there. And this is BEFORE the purge. Tsunade and Ren will be busy collecting samples and dissecting cloned bodies of bloodlines. Imagine them figuring out how to transfer bloodlines to people. They could acquire Lava, Boil, and other rare releases only found in Kiri. When they’re done with Kiri, they should infiltrate the other hidden villages and ransack them of all of their techniques. Go to kumo and get their lightning chakra mode next.