Board Thread:Fanon Canon: Applications/@comment-25152698-20140829213226/@comment-25152698-20140830195939

Well, only the toad sage mode has ever been seen transforming people into, well, toads, so it could be theorized that it's only a toad thing. Acacia would have sealed a small portion of chakra at a time, though even a mere fragment of the kyuubi's chakra would force him berserk. He would succumb to it's hatred, I guess in a similar idea as the equivalent to turning to stone via Toad senjutsu training.

Also, while he would succumb to the natural energy, he wouldn't allow it to take over him entirely, conducting a nuclear fusion of some sorts, combining kurama's natural energy with the ions and isotopes of his iron. Acacia, while he does not possess senjutsu per say, he manifests iron in a similar manor, drawing it directly from the earth's crust.