User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-6050823-20150222185350/@comment-11537809-20150222195659

Huh, so this explains why Chaos Gore Magalas only appear in the Heavenly Mount (from what I've seen) since the Shagaru Magala lives within that area and therefore causes Gore Magalas that get too close to fail at molting.