User blog comment:Godisme/Rag Lag Rumble/@comment-1624279-20111020221835/@comment-1243139-20111021062212

I'm not sure if this'll work, but think of it this way, Tsukushima's victims are books, he is a book mark and when he stabs or cuts someone, it's like a hand pulling the bookmark down onto a certain page i.e a part of their life. Once Tsukushima cuts or stabs someone, it's like he's read their life and used his sword to "pull" him into the parts that interest him.