The Demon King Yi rarely showed himself, and the Immortal Cultivation World knew little about the Dao he cultivated.
The ability he possessed to encapsulate people in cocoons and digest them was actually a natural Divine Skill of his demonic nature, not a capability of the Dao. What he truly mastered was the Dao of Spirit Exclusion.
The Five Elements Wood was also divided into Yin and Yang paths, where the Yang Wood was called 'Everbloom,' representing the vitality of the Five Elements Wood, capable of absorbing the breath of living beings between heaven and earth to extend one's lifespan; the Yin Wood was called 'Spirit Extinction,' representing the killing intent of the Five Elements Wood, capable of transforming into potent poisonous Spiritual Power to plunder the lifespan of living beings in the world.
In short, the power of the Dao of Spirit Extinction was "poison."
The Yang Wood nourishes the body with spirits, and the Yin Wood kills people with poison.
