The Motor de Diferencia first appears in Volume 2 as a steam-powered mechanical calculator, a marvel of the era's engineering that hints at the world's hidden supernatural underpinnings. Across the series, this device evolves from a mere computational tool into a conduit for mystical energies, its gears and mechanisms becoming intertwined with the arcane forces that govern the Lord of Mysteries universe. Its transformation underscores the series' theme of blending industrial progress with eldritch power, culminating in its role as a pivotal artifact in the unfolding cosmic drama.

The Motor de Diferencia first appears in Volume 2 as a steam-powered mechanical calculator, a marvel of the era's engineering that hints at the world's hidden supernatural underpinnings. Across the series, this device evolves from a mere computational tool into a conduit for mystical energies, its gears and mechanisms becoming intertwined with the arcane forces that govern the Lord of Mysteries universe. Its transformation underscores the series' theme of blending industrial progress with eldritch power, culminating in its role as a pivotal artifact in the unfolding cosmic drama.