User blog comment:Real Godisme/469. What I want to do/@comment-4449950-20160118221454/@comment-1776824-20160119010409

Because if he opens the book, he probably would have realized that he was E.N.D., which Igneel clearly didn't want to happen. There was still Ethernano in the atmosphere. Logically speaking, anyone could have opened the book and nothing would have happened, because E.N.D.'s book was magically sealed to do basically nothing as long as Ethernano existed.