LORE QUESTION [ How did the snow came to Coerthas? ]

[Drivont]

I agree with the idea that the Giants Summoned her and she spread across the area. Seeing as Cor was pretty barren in 1.0 and the Aether was amassed there the Giants may have then had the ability to summon their once dormant Primal.
But more importantly the open question of WHERE IN THE NAME OF THE TWELVE IS BAHAMUT!?!?!?!?!?!

Bahamut is probably underneath all of us, sleeping quite comfortably.... My guess is those keys from Dalamud are gonna server as dungeon climbs, downward to his Great Labyrinth. Just my theory.