The confrontation with Yabuli is the dramatic centerpiece of Honkai: Star Rail’s Version 4.6 story, “Dance With the Beast Before Moonrise.” It drops Trailblazer Caelus, Ashveil, and Kuchiba into a trap deep inside Astropolis, then escalates into a ritual that summons the power of the Voracity Aeon Oroboros before spilling straight into a two-phase boss fight.
Quick answer: The scene is a story cutscene where the party, caught in crystalline thorns, faces a masked foe and a devouring orb, a blonde ally invokes Oroboros to strike back, Ashveil’s demonic arm overloads, and Kuchiba seals it before the fight against Blood of the Fallen God: Yabuli begins.
Why the party is inside the Life Sciences Institute
Version 4.6 continues after Nihilux discloses that she is Aha, the Aeon of Elation. With the Trailblazer and Pearl supporting her, the group enters the Life Sciences Institute beneath Astropolis to uncover a plot to “weaponize the husk.”
Located beneath Madam Yabuli, head of the IPC’s Technology Department, the institute produces every imagenae in Astropolis. Yabuli is advancing the “weaponize the husk” scheme regardless of the lives it puts at risk across Planarcadia, and may be connected to a faction in Astropolis that worships the Voracity. To preserve peace, Pearl uses the search for Leviathan Essence as a pretext to pair Kuchiba and Ashveil with Nihilux and the Trailblazer for an investigation. The cutscene starts when they fall into a trap.
Who appears in the confrontation
The cutscene is a pre-rendered story cinematic featuring several canonical characters on one side and two threats on the other.
- Trailblazer (Caelus) — grey-haired, in the default Trailblazer outfit and holding a glowing golden lance.
- Ashveil — wears a fedora and possesses a red-glowing mechanical demon arm.
- Kuchiba — silver hair, beret, and glasses, armed with a dagger.
- A blonde woman in a black coat — the one who “calls the shots” and invokes Oroboros.
- A masked adversary — glowing red cross-shaped eyes, breaks free and fires an energy blast.
- A massive purple orb — harbors a devouring entity that speaks of consuming their joy.
What happens in the cutscene, beat by beat
The sequence runs a little under two minutes and moves quickly from ambush to counterattack.
The scene begins with the group restrained among jagged purple crystal spikes. The blonde woman says their Ranger has been ensnared by morality, then takes command.
A masked figure with luminous red eyes shaped like crosses tears free and sends an energy blast toward the group.
A glowing pinkish-purple orb manifests soon after, taunting the group and promising to devour their joy.
As spikes rush toward them, Ashveil fights them off. The blonde woman asks him for help and calls Kuchiba to join in.
Kuchiba warns Caelus to step back, and Ashveil activates his demonic arm to power the ritual.
The blonde woman calls upon the Voracity Aeon, chants, and takes on a winged shape before unleashing a huge beam.
What was left sank into shadow; the beast crouched, wakeful forever… Oroboros, devour your own offspring!
The backlash hits hard: purple rifts split the sky, and fierce energy races up Ashveil’s arm until he can no longer control it. He cries out to Kuchiba, who rushes in and uses her dagger to block and seal the arm’s uncontrolled power. Afterward, the Trailblazer helps Ashveil catch his breath on one knee as the woman hovers overhead, saying she has not enjoyed “such a hearty meal” in a long while.
The Blood of the Fallen God: Yabuli boss fight
Once the cinematic ends, the combat begins against Blood of the Fallen God: Yabuli, a boss enemy that debuts in Version 4.6 and appears in the Astropolis world. The fight runs across two distinct phases.
Phase I: the orb form
Yabuli begins the fight in its spherical orb form, with Frenzied Beast’s Seed Germ minions at its side. A tutorial explains that Seed Germs pursue characters marked with Calibration and inflict Fallen God’s Decay. Another alert states that Yabuli receives a Blood-Brain Barrier when its HP falls below a threshold.
Phase II: “All Are Within Me”
At the close of Phase I, Yabuli transforms as the announcement “All Are Within Me.” appears. Its fractured purple shell breaks apart, revealing a haloed humanoid entity. The party continues attacking while handling summoned minions and avoiding area attacks; once the boss’s HP is gone, Yabuli delivers its final lines and falls.
After the fight, a cutscene shows Kuchiba wielding dark power against the spatial rifts, with Ashveil supporting her using his empowered arm. Kuchiba then discusses Astropolis, chimeras, and the price of maintaining the region’s stability with Nihilux, Ashveil, and the Trailblazer.
Where the scene fits in Version 4.6
“Dance With the Beast Before Moonrise” launched on September 28, 2026 for EU and Asia servers, following a September 27 rollout on NA servers. The Yabuli confrontation sits inside the update’s main story alongside the “Good Hunting” mission thread and the follow-up mission “‘Core’ of My Heart.”
The featured banner character is Pearl, a 5-star Ice character who follows the Path of Elation and serves as Planarcadia’s CEO. During combat, she can use her “Certified Banger” to absorb some damage for the entire team. She can also enter “Deep Learning” and copy a selected teammate’s combat data to perform an Enhanced ATK. When that ally follows the Path of Elation, the attack adds Elation damage; if every team member follows that Path, the chosen teammate also gains an extra turn and a large amount of Punchline and “Certified Banger.”
The version also brings reruns for Evanescia in the first half and Mortenax Blade in the second, along with a boosted drop rate for the Light Cone “Colors for Tomorrow.”
On the events side, the “Love, Ghosts & Robots” management event tasks the Trailblazer with running Skott’s mechatron workshop, and the “Interastral Peace Gala: One Take” combat reality show also kicks off.
Two new Cavern of Corrosion relic sets, “Dreamlit Actor” and “The Edacious Heretic,” also arrive with the update for players gearing up after the story wraps.
Taken together, the Yabuli cutscene is the moment the update’s threads converge. The investigation into “weaponizing the husk” collides with the worship of the Voracity, Ashveil and Kuchiba show exactly how far their powers reach, and the fight that follows sets up the version’s later beats around Pearl, the Supplicants, and the fate of Aha.
