User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-50.241.248.226-20150721203927/@comment-26285797-20150722024815

I'll give you the Heavenly Dragons, but the Ouroboros is from Greek mythos, a major. On second thought though, Crom Cruach and Balor are from the lesser known irish mythos, and the other two strongest evil dragons are from lesser known ones as well.