The dragon step is taken from Wushu, 歇步 (Xie Bu - “resting stance”).
The dragon step is a great way to condition the lower body in an unusual position. The pivot transition also teaches how to shift your weight in rotation on the ball of your feet.
The arms should not be forgotten, they provide momentum to make the pivot easier.
Build strength with a curtsy squat
Progress by performing from standing, then from deep squat, keeping hips low.