So about that Eden

[Daralii]

Yes, this sequence is almost an exact replica of the summoning animation for Eden from FFXIII. Pretty much the only thing missing is the animation of Eden are the slow pans across Eden and moving the enemy (us, in this case) into position. Since FFXIV wasn't even a twinkle in Tanaka's eye at that point this animation was created for FFVIII, it is very unlikely that any of the symbols we see here were intended to have any meaning for FFXIV.

That said, there's nothing stopping the devs from retroactively assigning some meaning. Twelve is a useful number, and triangle is a useful shape. XD

Side by side of the animations with them trimmed to match up, because Eternal Breath in VIII was easily twice the length of it in XIV.