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Bai Chilian, Lady of the Twin Serpents is the boss at the end of Snake's Reflection in Phantom Blade Zero. She fights around the Threadbound Great Tree after the Mirrorwood mist route.

Encounter details
Detail | Information |
|---|---|
Region | Crimson Forest |
Chapter | |
Location | Threadbound Great Tree, beyond Mirrorwood Depths |
Rewards | White Serpent and Crimson Viper; Resonance Talisman |
Punish the reappearance
Her sideways roll can lead to a dagger volley, a disappearance and two close-range strikes from behind. Defend through the follow-up and counter after the pair of hits. A disappearance can also end in a Sha-Chi-draining surprise attack and a short combo with a dodgeable thrust, so do not assume every return has the same ending.
Second-phase openings
The later phase adds longer sword and serpent sequences. Look for the final blue-glint lunge to parry and create a grounded damage window. Stay close enough to use a stagger while continuing to watch the aerial attacks.
When she launches upward and spins, defend through the spinning hits and dodge the final red-glint strike. Adjust or release lock-on if the camera hides the cue while she is high above Soul.
Quest connection and rewards
Completing Resonant Strings provides an additional interaction during the encounter. Defeating Bai Chilian awards White Serpent and Crimson Viper and the Resonance Talisman, then the story moves to the Village of Lu.