Kamen Rider Build: Transformation Lessons ~The Laws Of Transformation Are Set!~: 1x2

Night Rogue Chapter

Gentoku Himuro films a FausTube video in their secret lab base showing his viewers three things: his transformation into Night Rogue, the combination of the Transteam Gun and the Steam Blade: the Steam Rifle, and the Steam Rifle’s finisher: Steam Shot with a Faust Bottle.