User blog comment:FairyRaven/Fairy Tail Chapter 357: The Nine Demon Gates, Review and Commentary/@comment-16214733-20131025094546/@comment-77.195.192.217-20131025095641

As Zeref was present during all the GMG, he saw that Ultear is not a treat anymore, so maybe he will decide to not attack her. I think there is something strange about the GMG and the Eclipse gate, and the more I think about it, the more I think that the royal family and even future Rogue were manipulated by Zeref to test them. Why did Rogue go back to 400 years ago, and how he did that as it was stated a gate was necessary to travel between two periods, I think Zeref was behind this