User blog comment:Miskos3/Fairy Tail 514: Dragon Seed, Review/@comment-24784846-20161213010900/@comment-1776824-20161214171225

I thought this chapter completely confirmed that Acnologia became power-hungry and murderous because he couldn't physically contain the dragon instincts in his body. But regardless, it takes time to remove magic. Acnologia certainly wouldn't sit down and let it happen, and if Irene could have done it to remove him from the war, I'm sure she would have. Instead, she had to teleport him away.