User blog comment:Godisme/Rain as a Blade/@comment-44061-20111012234930/@comment-2048489-20111014171043

I have to say, this is getting out of hand. I think it's a bit farfetched to say that it directly affects the soul of whatever he strikes. I believe that, from what we have seen, it directly affects the affected object's TIMELINE. I do agree with Seireitou here; Tsukishima's ability has been consistent. We were never revealed the full extent of his ability before; we were only revealed that he inserted himself into their memory. Now we know this is not the case. Whatever Book of the End cuts, he puts himself into that object's very history. It's very hard to explain, but Kugo's statement of Book of the End's mechanics are far more literal than we realized. "For them, Tsukishima was always there." Whatever the affected "remember", whatever the effects of Book of the End take, they are realities, because what they "remember" truly happened--for their separate "reality". It is an extremely confusing ability that is so overpowered. It's much worse than time travel, people. Picture people's histories like a book. Whoever Tsukishima cuts, their "book" in which their history is recorded is rewritten to suit Tsukishima's needs. He has been creating an entirely separate reality for himself--stringing the "books" of others to gether into one large compilation of his own. He is creating his own reality.