Gas Pipes first appear as mundane Victorian-era infrastructure in the Sin Rostro arc, quietly threading through the villas and streets of Tingen. Their presence is initially atmospheric—white-gray conduits feeding elegant lamps—yet they become the hidden circulatory system of the city’s industrial magic. Across later volumes the pipes evolve from mere background detail into conduits for Beyonder phenomena, carrying not only illuminating gas but also the residue of rituals, the whispers of sealed artifacts, and, ultimately, the breath of Outer Deities.

Gas Pipes first appear as mundane Victorian-era infrastructure in the Sin Rostro arc, quietly threading through the villas and streets of Tingen. Their presence is initially atmospheric—white-gray conduits feeding elegant lamps—yet they become the hidden circulatory system of the city’s industrial magic. Across later volumes the pipes evolve from mere background detail into conduits for Beyonder phenomena, carrying not only illuminating gas but also the residue of rituals, the whispers of sealed artifacts, and, ultimately, the breath of Outer Deities.