Save at the checkpoint below the golden pillar, then walk into the light. In the dark scene beyond it, approach the hall and finish the courtyard dialogue to start the fight.
In the night courtyard, Zuo Shang can send out a low blue ring. When it forms in front of him, stay outside its path and close in once it dissipates.

After the transition, the health bar identifies Zuo Shang’s dragon form. He can follow the golden weapon effects with a red close-range slash. Leave room to evade sideways and counter briefly after the arc passes.

After emptying the health bar, watch for the onscreen input. The recording displays B on a controller. Follow the prompt for your device to finish the sequence and reach the cutscene.
