O.O OMG I think I understand it, Lightning( not the spell the amazing character)is the source( I'm being dead serious) remember when in ff Lightning returns at the end when basically during her final fight the new world and current universe was destroyed in the wake of her battle against the creator of her universe by being sucked in a black hole maybe this new world became eorza that would explain why some ff13 enemies are in the allagan ruins or hydalyn is Lightning. Thank you to listening to a FF13 addict.