User blog comment:FairyRaven/Fairy Tail Chapter 353: Exorcism, Review and Commentary/@comment-11966702-20130927160440/@comment-7418318-20130927164629

Considering that Igneel failed to destroy it, it's probably still in effect.

Could it be the source of Zeref's power and immortality? If so, he'd have to have partial amnesie, or his death wish wouldn't make much sense...

Could it be that E.N.D. and Lumen Histoire are the same thing?