Can someone explain Dalamud and Project Meteor and Meteor spell?

[Viridiana]

Yep I played since v1 and also have an alternate. They show you scenes that explain it through both echo and normal dialog you start meeting the three nations and continue as you progress through main story.

Happen to remember a rough location of where they discuss it? I know MSQ has some flashbacks to Careneau, but they don't really go into the leadup from what I recall. Most of the Dalamud/Bahamut stuff was handled through Binding Coils, which is why those raids had some outstanding story. I seem to recall some of it being mentioned in the CT quests, as well, but neither of those were MSQ.