Speculation from the 4.1 trailer (A hint of a new job?!)

[Rysir]

Ok, but do we know for sure that the holy stones werent auracite of some form? We only saw a couple of them in XII, and theres no saying there werent others. And thinking back, we saw the dawn shard overload and destroy some testing equipment... and we saw the aftereffect of the midlight shard having been used in Nabradia and an "explosion" that destroyed everything. I seem to recall releasing a lucavi being somewhat explosive. A quick rampage later and there might be no survivors to tell the tale of what actually happened.

Im more so poking at the being a FF12 reference part as the Holy stones/zodiac stones which first appeared in FFT are renamed auracite in the FFT war of the lions re-release. They are also very much the same stones since 12 is a prequel to FFT as weird as it sounds.

Basically Im saying its more a Tactics reference instead of a 12 reference really.