What happened to SB (story)?

[Galgarion]

And it's worth noting this 'requirement' was partially undermined when Illberd summons an entirely fabricated primal without any real religious zeal, just a very angry speech and a bunch of blood 'sacrifices'. There wasn't really a ritual either, he just got really angry and used a bunch of aether in some dragon eyes (Which somehow weren't spent YET, but will be AFTER...) to summon what is apparently a primal strong enough to rival Bahamut. (Which was probably summoned by a whole SLEW of dragons, with a lot more eyes than just two, and should be far more powerful....)

Nidhogg wasn't 'some' Dragon though. He was one of the first Brood. He was so powerful that when he called for a new war against Ishgard, it woke Midgardsomr up from being dead. Nothing against the slew of dragons who summoned Bahamaut, but even in their thousands, they were still small fry compared to Nid. Besides, it wasn't the power of their eyes that was being used to fuel Bah. The Alagans had crystals aplenty for that.