Bai Chilian

Bai Chilian, Lady of the Twin Serpents, is Phantom Blade Zero's two-phase Crimson Forest chapter boss beyond the Threadbound Great Tree bell, and beating her closes several side quests. Parry most cuts, dodge her red flashes and power lunge, and she drops the White Serpent & Crimson Viper and the Resonance Talisman. 64.3% of Steam players had beaten her by Nov 9, 2026.

Finish the Outpost and the Thieves' Camp before you ring the Threadbound Great Tree bell: Bai Chilian, Lady of the Twin Serpents, is a required main boss and a point of no return, and several side quests close the moment she falls. She is the chapter boss of Chapter 4, Snake's Reflection, fought in the blue flower meadow of the Crimson Forest, and she falls to steady parrying with dodges saved for her red flashes. Her achievement, The Shattered Mirror, climbed from 20.5% of Steam players on Oct 31 to 55.5% on Nov 4 and 64.3% on Nov 9, 2026, so roughly a third of Steam players had not yet gotten past her eleven days after launch.

The meadow is easy to recognize in PowerPyx's Oct 29, 2026 recording of the fight: by 0:29 Soul is knee-deep in pale blue flowers in green mist, the thread-hung tree looming behind, with her name on the boss bar.

Before you fight her

Save and clear the Outpost and the Thieves' Camp first. AllThings.how says her defeat fails Honor Among Thieves and closes A Healer's Mercy, Festering Secret and Purge the Sect, and Game8 says the people of the Outpost and Thieves' Camp turn Maskless and hostile afterward. One trophy rides on this too: The Last of Baishan needs Secrets of the Baishan Sect accepted before she dies (Trophies and Achievements), and the other quests on the line are on Side Quests.

The meadow beyond the Great Tree

The Threadbound Great Tree bell lies past the mist portal puzzle in the Mirrorwood Depths. Rest there, cross the flower field toward the huge twisted tree hung with threads, and walk into the fog to start the fight; the same bell is where you respawn. Game8 describes the arena as the eastern side of the forest, near the Mirrorwood Depths bell.

Parry, then strike in the pauses

She has two health bars, 29,389 HP and then 33,062 HP on AllThings.how's count, with a cutscene between them.

Parry most of her cuts, and start at her first movement: AllThings.how warns that many land sooner than their animations suggest. Dodge the red flash, the power lunge, the flurry's last cut and the dark whirl.
Stay defensive and attack in the pauses between her moves, as Game8 advises; PCGamesN says to block often and attack when her Sha-Chi is broken.
Game8 recommends the Outlaw Warblade: charge it while she has vanished and release it as she reappears, since its stagger resistance keeps her from breaking the charge.
Drink only when she is far away, right after a string ends. Each gourd restores about 400 HP; save some for her second phase.
Switch weapons to refill Sha-Chi when it runs low, and use Remnant Spark: Phantom Edges hit her hard.
Lock-on splits the guides. PCGamesN, calling her the fastest boss so far, says to keep it on to track her blue and red attacks from the sky; Game8 says to turn camera lock off during her high aerial lunges so the glint is easier to see.

On Pathbreaker her hits cost Soul about 60 to 120 HP each, the heaviest about 165; Wayfarer cuts that by about 30% (Difficulty Modes).

Phase 1: Lady of the Twin Serpents

Fast lunging thrust: her most frequent attack, so it deals the most damage across the fight, about 95 and 120 HP on Pathbreaker. Parry as she advances.
Barrel roll and dagger volley: she rolls sideways in the air throwing daggers, then teleports behind you for two blockable hits. Hold block through all of it, then counterattack in the long opening after.
Sha-Chi draining ambush: after vanishing she may come back behind you with a Sha-Chi draining attack; dodge as she approaches, then expect a three-hit combo ending in a dodgeable thrust.
Crescent sweep and ribbon double-cut: parry, and keep guarding through the second cut; don't attack into the spin.
Leaping slash: parry her landing or dodge sideways.
Twin serpent summon: move away from where the serpents emerge, then dodge sideways when one lunges.
Dark whirl: dodge out of the spinning area.
Blade flurry: block the light cuts, then parry or dodge the last one, which breaks guard.
Power lunge: cannot be blocked; dodge. About 120 HP on Pathbreaker.
Red-flash strike: dodge as soon as the flash appears, since its second blow cannot be parried.

Phase 2: the Sacrificial Serpent

When her first bar empties, a cutscene turns the sky red and the field pink, and she returns as Bai Chilian, the Sacrificial Serpent, a mass of serpent coils hanging from her strings. She stays mostly airborne, so stay close to hit her when she lands and is staggered.

Opening swings: five aggressive swings, a five-hit serpent combo and a parryable lunge. Parry the lunge and block the rest to stagger her for a few hits.
Aerial spin: after a stagger she may leap spinning into five spin attacks and an aerial strike. Block the spins and dodge the last hit at its red glint, since Game8 calls it potentially lethal.
Diving wind attack: when she gathers wind and leaps, leave the wind circle beneath her at once, dodge the landing, then perfect dodge and punish the strike after it.
Spinning serpent ring: back away during the spin and dodge as she descends (AllThings.how).
Crawling serpent form: you cannot outrun her; guard or dodge as she closes in.
Serpent burst: get to range as soon as it starts.

A death in this phase restarts the fight at the Sacrificial Serpent rather than at her first bar, the phase checkpoint every two-phase fight in the game shares (Bosses).

Twin swords and a talisman

The cards appear at the Place of Awakening beside a crane statue in the Village of Lu: the Broken Illusory Pipa, a story item; White Serpent & Crimson Viper, a dual-wield weapon with 260 damage and 110 guard break whose Twin Serpent Dance loops for as long as you alternate its two attacks; and the Resonance Talisman, +15% Sha-Chi. The twin swords' place among the other blades is on Weapons.

Before launch, TheSixthAxis called her fight "brutal", Inven Global (which spelled her Bai Jielian) described a chain-like weapon that extends at will, and she was one of two standalone fights IGN China played at S-Game's Beijing event.

Frequently asked questions

What happens after you beat Bai Chilian? The Outpost and the Thieves' Camp turn on you: Game8 says their people become Maskless and hostile, Honor Among Thieves fails, and A Healer's Mercy, Festering Secret and Purge the Sect close for good. The story moves on to the Village of Lu, where her rewards wait at the Place of Awakening.

How many phases does Bai Chilian have? Two. Bai Chilian, Lady of the Twin Serpents, has 29,389 HP on AllThings.how's count, and after a cutscene Bai Chilian, the Sacrificial Serpent, has 33,062 HP and fights mostly from the air.

What is the best weapon against Bai Chilian? Game8 recommends the Outlaw Warblade from Jing Ye, charged while Bai Chilian has vanished and released as she reappears. Its stagger resistance means her return strike cannot cancel the charge.