User blog comment:BannedLagiacrus/Discussion of the Week: Dangerous First-Class Monsters/@comment-27125903-20160424083606/@comment-4009941-20160424173722

From space or made by the ancients is my theory for all the first class and origin of Dragon element. Like unlike our earth at some point if you go by whatever caused the extinction of Dinosaurs. Instead what happened in MH world is Dragon Element infusion mutating and changing the wildlife in MH world from our own. But that is just a theory with no proof.