The Regression of the Lowkey Vanguard

The story is set in the Nine Heavens Domain, a world divided by massive cultivator sects, ancient martial families, and dangerous monster-filled wilderness. Power is defined by the Nine Seals of Qi. Upon his death, the MC awakens the "Heavenly Guardian System." Unlike flashy, world-conquering systems, his interface focuses on Subtle Deflection, Observation, and Unbreakable Foundations. In his first life, Shen Jin was a mediocre outer-disciple who sought fame, got caught in a war between high-tier cultivators, and died an agonizing, meaningless death as collateral damage. — Description from novelcodex.org