Originally originating from the Cilfo Hills as a Monster, Nautilus was worn down from their trek to the more populated towns, and began to melt. After being found and taken in by the Lindol Corporation, they were given new life in a mostly synthesized body, making them a Creatfegen; a natural, but synthesized creature. Their original body is the liquid being heated by their newfound body, so losing power to the heater would mean death.