User blog comment:Zetarion/Fairy Tail 406 - In Which God Has Long Forsaken Hiro At This Point (The Girl In The Crystal)/@comment-3030647-20141101224050

Lol, I think I should just comment on this one blog. I hope you all remember the effect Tenrou Island had on Fairy Tail's magic supply, yes? Due to the presence of Mavis' spirit (I assume), it had the effect of rejuvenating the magic of Fairy Tail members so long as they had the guild mark. This was temporarily taken away by Azuma until Erza defeated him, etc.

I'm pretty sure myself that Lumen Histoire could possess this effect. Albeit, given the most recent chapter, it's highly possible that it is a very, very powerful effect on top of this. But, at some point, E.N.D will awaken and in order to give Fairy Tail a fighting chance, they will need magic. So...that's my theory on it. I dunno.