User blog comment:FairyRaven/Fairy Tail Chapter 465: 400 Years, Review and Commentary/@comment-24546844-20151207181359/@comment-79.249.43.27-20151207220950

maybe there's a difference on where you want to timetravel to like... it's easier to travel to the past than to the future since there could be many timelines as you remember. Though to get a hold of the rules of timetravelling I think a reread of the GMG-arc is necessary.

What I'm more intrigued with is the possibility of the Dragonslayer having to do something with Layla's death maybe. I mean when she opened the gate, there would be five kids coming thinking their parent has vanished. Or something like that. It wouldn't surprise me, if she took care of them for a little while. More likely I expect that since she was a mother.

But well uh... she gave her keys away before X777 so how'd she open the gate?