User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20151212224531/@comment-17735225-20151213045608

No mentioning of the rainbow weakspot, the reason area glow during its final phrase, and how it use dragon attack?

I should also mention the description of dragonbone relic 'a curiously unfossilized bone'. This is rather too wild a theory (and there's also many possible interpretations of this) but maybe its mucus also unfossilize bones and we have been seeing its hunting trace from as early as monster hunter tri? That will explain the giant skullon its back (It's probably modified Lao's skull though) and the gigantic bones around the area.

Also this guy is actually the one that save the entire ecosystem by destroying its own lair, preventing any further osutoguy from coming back(for a while, at least).