Blue Feather Immortal Sage

Blue Feather Immortal Sage, also called Lan Yu, is the Dao Integration ruler of Yuandao Prefecture whose public death, scattered inheritance, and hidden Devouring Rebirth Formation turn an orderly province into a long sacrificial struggle. Later chapters reveal that he follows the ancient cultivation method and survives into a branch where he leaves Xuanhuang with other Dao Integration cultivators.

Biography

Fortunately Obtaining the Canghai Pearl

Blue Feather rules Yuandao for nearly three thousand years and protects a vast hierarchy later called the Blue Feather Sect. Near the end of a finite lifespan, the sage divides the Heavenly Feather Transformation Technique among guarded jade slips, scatters blue legacy boxes, and leaves the Tiandu Martial Arena as a venue for succession by strength. The public death announcement shows a blue-robed Daoist projection aging from child to adult and elder, but that manifested sequence does not establish his fixed everyday appearance. Afterward, adopted heirs and dependent factions fight over leadership. The turmoil is eventually revealed as material for a Devouring Rebirth Formation that consumes subordinates, relatives, and enemies in an attempt to reverse death; whether each simulation completes that return is not consistently shown. (Chapters 141–164 and 254–256)

Later evidence identifies Lan Yu and Blue Feather as the same person and reframes the announced death as part of a continuing attempt to reverse life and death. In a later branch, he joins the Dao Integration expedition into the star sea, where his ancient-method foundation leaves him less bound to Xuanhuang's laws than his companions. He intervenes when the expedition's vessel tries to consume captured Heavenly Spirits, but the group is ultimately caught by the Xuan Immortal Ark. The Ark extracts his testimony for its Xuanhuang report; the corpus confirms survival into captivity, not his release or a completed Longevity breakthrough. (Chapters 716–723 and 1266–1288)

Appearance and personality

Blue Feather's death vision uses a blue-robed humanoid Daoist form that passes through visible ages before withering, while the heavens grieve with rain and beasts howl. The corpus does not securely fix his ordinary facial features, species, or original anatomy. Conduct is imperious, strategic, and ruthless: he sustains provincial order for millennia, then treats the same social structure as fuel for survival, yet later prevents the star-sea expedition from wastefully destroying the Heavenly Spirits around its vessel. (Chapters 141, 147, 255–256, and 1280–1281)

Abilities and cultivation

Heavenly Feather Transformation Technique

This prestigious Tiandu inheritance is Blue Feather's signature cultivation method and the political symbol of succession. It is divided into five encrypted portions, preventing any claimant from simply taking a complete copy. The corpus establishes its fame and inheritance structure more clearly than its individual combat mechanics. (Chapters 146–159 and 255)

Devouring Rebirth Formation

Laid before death, the formation channels years of provincial bloodshed toward Blue Feather's attempted return and pursuit of longevity. A black-robed cultivator recognizes that even his own schemes were manipulated by it. The exact completion conditions and successful final embodiment remain uncertain across simulations. (Chapters 159–164 and 255)

Relationships

• Dugu Xi and Dugu Shi: Blue Feather's adopted twin heirs become principal claimants to the divided inheritance, and their disappearance accelerates the province's collapse.
• Li Fan: Li Fan observes the death and reconstructs the rebirth scheme from other participants; he does not form a personal alliance with Blue Feather.

Items

• Blue Feather Legacies: Blue boxes of varied possessions are deliberately scattered for destined finders. Once released, their custody passes among claimants rather than remaining with the deceased sage. (Chapters 146–147)
• Tiandu Martial Arena: Blue Feather constructs or inherits this self-contained sparring arena for subordinates. It becomes a public succession venue after the sage's death, not a personal carried object. (Chapter 147)