A big shell-tron, created by nature and ancient civilization. Its spir

A big shell-tron, created by nature and ancient civilization. Its spiral is packed from a dark mother of pearl with veins of liquid gold, and the inside is highlighted by turquoise biolyumescent radiance. Each curl is decorated with microscopic runes telling the history of sunk kingdoms. Style dark fantasy, atmosphere of the sunken cathedral, macrophotography with cinematographic light