User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20150928011849/@comment-6050823-20150928225107

^ There is an explanation for that giant Great Sword. The Great Sword was left behind by an ancestor of the chief that once lived in Pokke Village many years ago before Ukanlos killed him/her. It could be assumed that maybe her ancestor was about as big as the Great Elder(His Immenseness).

The Wyverians are basically reptile humans, better yet evolved from reptiles.