He died at the hands of his eldest brother that he idolized all his life...
Dean looked at the leader of the True Dragon that was wreaking havoc in the Heavens Gate.
He took one look at this giant beasts that span over 3 mountain range and made a conclusion "This guy is my dinner."
The Planet Toppling beast that destroyed many ancient sects and family. Carving fear at the hearts of many it was unrivaled.
"So so, it needed more saltiness. But wife could fix that for me."
The great Devouring Overlord of the Continent and the Heaven is truly willful.