User blog comment:- Darkchylde/Acnologia's Element?/@comment-173.87.12.242-20141211055642/@comment-4829046-20141214082132

Actually the points I made in the latter part is based on info we already have in the anime. There is no 'real' info on Acnologia in the manga except for a change in behaviour. Again, I highly suggest that you read the manga.

Dragon Lacrima mechanisms are still unknown. My best theory on that was the a lacrima can only be formed by concentrating the power of the Dragon and since there is only one for each element so far, it was my belief that the dragon needs to be killed first. But recent chapter sorta debunks that a bit so it could be that the a Dragon can choose to make lacrima and this way multiple ones can be made. But then the problem with that is "Why aren't there more DS then?"

And about Zirconis, yes, we do keep that in mind, but then we have zero ground to go on for any debate. And since you brought that up, I remind you that Arcadios confirmed it was true based on official archives. So it being entirely false would literally render all the info we know to be moot.