The movie Saraba Kamen Rider Den-O: Final Countdown introduces a new system, Kamen Rider Yuuki (仮面ライダー幽汽, Kamen Raidā Yūki, lit. "Miasma" or "Ghostrain"), an evil Kamen Rider system used by those who have control over the Ghost Train (幽霊列車, Yūrei Ressha), a skull-faced steam-engine that transcends the world of the dead and the flow of time.