"It really is a subway..."
Four Dark Kegs looked around and couldn't help but whisper in amazement.
It took descending four flights of stairs from the subway station to reach the spacious underground space—clearly, because the roadbed was not stable, long-lasting lamps ignited by the transformed product "green fire" were reserved.
Although there was a distinctive steampunk flavor to the architectural style, it definitely resembled the subway stations in his memory.
But it was obviously not an electrically powered subway... Instead, it was an underground railway train powered by a magic-altered engine with an elven style, using the transformed product as a converter, and drawing Mist as energy.
If it were not so, developing subway technology centuries ago would have been almost impossible. Recently, various nations have also begun to research how to create efficiently operating subways without adopting the engine technology of the Underground Federation.