User blog comment:IamJakuhoRaikoben/Chapter 405: Tartarus Arc: Part 6 - Magna Carta, Review./@comment-24622358-20141022001341/@comment-7418318-20141022101610

As far as we know she wasn't even a mage when she died, so how would Lumen Histoire help Fairy Tail right now if it was Zeira encased in a crystal?

Makarov and Precht seemed pretty conviced that LH would somehow be able to change the tide of battle in FTs favour or maybe even outright win the conflict and I just can't see that happening if it's Zeira.

Besides, if it was Zeira's body, how would Prechts line "release the light" make any sense? It's a bad enough stretch if it's Mavis or someone else's body, but what we saw of Zeira's personality is qutie far removed from something called light.