User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-25259914-20140903213540/@comment-6050823-20140903220955

Actually, that might not be Khezu Skin. It hasn't been confirmed what that skin even belongs too so for all we know it could belong to another monster that hasn't been announced yet, an old monster corpse that has greatly rotten, or Khezu. Anyway, from the Old Desert's underground lake being connected to the some of the Old Jungle's rivers(Which some are said to be underground), Nerscylla Subspecies could just easily jump a Khezu while in one of those caves, rip off its skin, and go back to the Old Desert.