Yin-Yang Reincarnation Technique

Biodata

Background / History

The technique was listed among Cao Xiyu’s abilities through the Dream Entry Space System. By that point, Cao had spent ten years helping female soul masters cultivate in the Dream Space, while concealing his true god-level power behind the identity of a powerless live-in son-in-law. 1

Its existence became publicly known when the Sky Screen revealed that Doudou and Zhu Zhuyun had cultivated it to the eighty-ninth-level Soul Douluo realm. Zhu Zhuyun credited Brother Cao’s dream-based instruction with guiding her through successive bottlenecks and giving her the power to alter the future she had foreseen for herself. 4

The repeated appearance of young, high-level practitioners from unrelated factions drew continent-wide attention. Major powers debated whether the technique was an evil harvesting art, but Chen Xin noted that its users retained clear minds and acted with independent resolve. 4 Cao later confirmed to Ye Lingling and Xiao Cui that he had created the technique himself to help women improve their strength and change unsatisfactory fates. 9

Cao explained that the technique is practiced through dual cultivation in the Dream Space. The space’s time flow allows one year of cultivation inside to pass in a single day outside, enabling him to guide numerous practitioners without leaving Ye Family Fortress. 27 He later established a Space-Time Barrier capable of raising the Dream Space’s time ratio to one outside day for one thousand days inside. 53

As more users appeared on the Genius, Combat Power, and Goddess Rankings, the technique became associated with practitioners ranging from Soul Douluos to God Kings. Its reputation also made it a target for coercion: Yu Xiaogang abducted Doudou, Meng Yiran, and Xue Ke in an attempt to extract its contents, but failed before Xue Ke could reveal them. 70 71 72

Abilities & Characteristics

Dual Cultivation

The Yin-Yang Reincarnation Technique is explicitly a dual-cultivation method. Cao Xiyu stated that it strengthens the women he guides while also increasing his own power. 27

• Enables rapid growth beyond a practitioner’s previously known level.
• Has produced Soul Douluos, Titled Douluos, gods, and higher-ranked beings among its known users. 4 21 45 51
• Its users remain capable of independent decisions rather than behaving as controlled cultivation vessels. 4
• Its complete method is not publicly available; practitioners refuse to disclose it even under threat. 71

Dream-Space Cultivation

Cao teaches and practices the technique through the Dream Space rather than conventional public training. 4 27

• One year inside the Dream Space corresponds to one day outside. 27
• Cao can cultivate and instruct multiple women while remaining physically at Ye Family Fortress. 27
• Repeated dream training can provide substantial practical-combat experience; Bai Chenxiang’s experience was credited with helping her overwhelm a higher-level Clear Sky Sect elder. 14
• The later Space-Time Barrier can extend the cultivation-time advantage to a ratio of 1:1000. 53

Fate-Changing Guidance

Several users connect their cultivation to learning of, resisting, or changing an unfavorable future.

• Zhu Zhuyun saw her original future of defeat and lifelong imprisonment, then gained the resolve and power to reject that fate. 4
• Qian Renxue stated that Brother Cao’s guidance allowed her to see tragedies awaiting her family and pursue a different path. 21

Associated Techniques

The Yin-Yang Reincarnation Technique is frequently recorded alongside Heavenly Demon Chaotic Dance on the Combat Power and Goddess Rankings. 29 32 33 45 51 58

Documented Practitioners

Genius Ranking Practitioners

Combat Power and Goddess Ranking Practitioners

Story Role / Major Incidents

• Public exposure — The Sky Screen’s revelations transformed the technique from a hidden dream-cultivation method into one of the most sought-after secrets on the continent. 4 5
• Factional investigation — Spirit Hall, the Seven Treasure Glazed Tile Sect, Clear Sky Sect, and other powers dispatched observers or agents to identify Brother Cao and locate his practitioners. 4 12
• Attempts at seizure — Tang Lie demanded Meng Yiran’s technique and rewards before being killed by an unseen intervention; the Clear Sky Sect’s Great Elder later attempted to pressure Bai Chenxiang into joining the sect. 5 6 14
• Expansion beyond the Douluo Continent — The technique later appeared among soul beasts, abyssal beings, and God Realm deities, making Cao Xiyu’s influence a concern for both the Abyssal Plane and the God Realm. 38 51 60 67
• Yu Xiaogang’s abductions — Seeking rapid advancement, Yu Xiaogang kidnapped three lower-level practitioners and attempted to force the method from Xue Ke with a memory-altering potion. The rescue party prevented the disclosure. 70 71 72

Relationships

• Cao Xiyu / Brother Cao — Creator and instructor; teaches the technique through Dream Space dual cultivation. 9 27
• Dream Space — Primary environment through which Cao guides practitioners and exploits accelerated time flow. 4 27
• Known practitioners — Protect the technique as Brother Cao’s secret and repeatedly refuse external demands for its contents. 5 71
• Spirit Hall and major sects — Investigate, monitor, or seek to obtain the technique because of the extraordinary strength of its users. 4 12
• Yu Xiaogang — Attempted to steal the technique by abducting and interrogating its practitioners. 70 72