hmm so many good theories though it still makes me wonder if sloppy illberd was even referring to rhalgr or nidhogg there could be the possibility of something else in the cocoon of light since he did deal with the ascians they could have even told him of bahamut ofor a primal possiblely even more fierce then that. i know midgardsomr is kinda following us but who knows if an asican captured a piece of his essence then infusing it into nidhoggs eyes we dont know what the limits of an ascians powers are.