The Adamant Rail is a stylized, hand-painted firearm resembling a cross between ancient Greek artillery and a steam-punk Gatling gun. It features a robust, angular metal frame with intricate engravings of mythological creatures and patterns, showcasing a blend of dark iron and bronze hues with glowing golden accents. The weapon has a rotating barrel mechanism and a stock adorned with leather wrappings, giving it a functional yet ornate appearance suitable for the underworld's arsenal.