Legends of the Civil Investigation Bureau: Memoir of Encouragement.

Summary

The Lone Heart Formation was developed by a female cultivator during the Qi Guo Huan Gong era, who excelled in formation techniques despite limited magical abilities. After marrying a man who abused her, she secretly trapped him within a formation, causing him severe suffering each time he attempted to leave. Despite attempts by various practitioners to break the formation, only one capable cultivator recognized her influence. Over the years, she nurtured her husband while maintaining her secret identity. Upon her death at 90, she left behind significant formations, notably the Heart-Trapping Formation, which became infamous for its lethal capability. Meanwhile, Bai Li Xi, trapped in a similar formation, sought his mentor, Xi Ying Zhen, with the hope of escape.

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