I am less bothered by its dragon form as if Ilberd was thinking about another calamity and had experienced Bahamut I could see him thinking of something much the same. However my issue is from what we know Primals require worshipers to maintain them and to our knowledge Shinryu has none or at least none that worship this form of Shinryu. Even Bahamut needed worshipers so what makes this Primal different?