User blog comment:HelloFalman/Ankhseram Magic Inablity/@comment-31.132.65.53-20150807101241/@comment-5896530-20150807205959

Firstly, such thing where Zeref loses control will never be repeated, because Zeref now has control over his powers (because he does not value life anymore whatsoever). If not an unforseen circumstance happen and Ankhseram himself makes him lose control, something which is possible.

Secondly, when I said awakened, I meant as in not being the man he is now. At the point with Ultear he still valued life and thus he had no control over his powers. When he appeared on Hades' ship in the aftermath of Tenrou Island arc he was awakened in my eyes as then he could control his powers, because . I hope I am making myself clear enough for you; I never implied Zeref was sealed away with those keys or whatever, I simply meant his persona was still pure at that point.

Lastly, what you are saying even seconds the fact that he was not defeated by Ultear. You're saying yourself he wasn't in control of his own actions. The fact that he attacked Ultear; it was not his intention to do so. He was defensless and did not act on his own accord. You wouldn't call that a proper fight would you?