Island of Khora
The creature, created by the heart that Victor Von Fink had crafted, is the ancient and powerful magic embodied into a snake-like creature that burrows underground, consuming ruins, buildings, caves, and unfortunately, cities. It consumes these and forms them into itself as it grows.
The heart that animates it is deep inside of it somewhere still. Victor has created a device capable of shutting down the heart and the magic animating the creature, but it needs to be connected directly to the heart.
The creature is comprised, on the exterior, of mostly stone, the inside is comprised of all of the things this consumed by the creature.