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Yubi is an optional Swordfighter Puppet boss in the Training Grounds at Mandate Encampment in Phantom Blade Zero. The encounter is part of Secrets of the Baishan Sect and awards Baishan Stormswords and Broken Vessel.

Reach the Training Grounds
Progress Secrets of the Baishan Sect through Wu Lengshuang and examine Bi Taotao's body. Follow the quest marker and use the Training Grounds Key on the red door. Activate the Training Grounds Bell before descending into Yubi's arena.
Parry the combo endings
Yubi uses aggressive strings that make trading hits risky. Watch for blue-glint endings after the slash-and-thrust sequence, the jump dash and the cyclone thrust. Timing a parry against the final strike gives an opportunity for a Ghoststep counter.
Dodge the flipping kick
The forward flip kick is marked with a red glint and can appear after a combo or from neutral. Dodge it rather than continuing to block. Low spinning slashes from her knees can also lead to an unblockable thrust.
Rewards and quest continuation
Reward | Category |
|---|---|
Baishan Stormswords | Dual-wield main weapon |
Broken Vessel | Accessory |
After the battle, Yubi points toward a building. Follow that direction to continue the Tale instead of treating the reward screen as the last quest step.