As a followup to an above poster, one moogle says something like "a hero from our past named Mog, used leaping attacks and wielded a spear"

Definitely an ff6 reference.

-Also 12 knights + thordan and their weird helmets look exactly like Knights of the round from ff7.
-Vault=Anor Londo...one of the bosses even looks like Ornstein
-Floating Continent = FF III and FF6
-Warring Triad from FF6
-Churning Mista resembles land of forbidden gravity from legend of dragoon
-Dragon's life energy coming from their eyes is reminiscent also from legend of dragon. In that game, gems shaped like dragon eyes called "dragon souls" allowed humans to become dragon knights