User blog comment:FairyRaven/Fairy Tail Chapter 421: Wendy and Chelia, Review and Commentary/@comment-4933386-20150223130123/@comment-4933386-20150223140728

I just thought maybe they used it and forced Doranbolt to erased their memory to making it seem like they haven't used it. Makarov could be in soul form that no one knew. I'm not sure if they will actually know when someone's in their soul form like Mavis.

I was just thinking of a way to link FT0 with the current one... Like because the explosion of the whole town is going to happen. Mavis somehow used all her power in order to restore what it was lost. which results in trapping her own body into the lumen histore.