Gu Moxie's counterattack: from the "mortal stagnant spirit body" (unable to gather Qi normally) to the "dao-devouring spirit body" (the more he swallows, the worse his physique becomes), a slap in the face to all those who laugh at "waste"
Devouring is the pinnacle: Killing the upright ones = increasing cultivation level + learning exercises + obtaining magic weapons + breaking barriers, no need for hard training, and the upgrade speed can crush all geniuses
Revenge of Relics: The destruction of the wooden sword is the core obsession. In the later stage, the protagonist will use the devoured materials to recast a "Dao-devouring Wooden Sword" and use this sword to kill everyone who has destroyed the things he cherishes.
The villain is justified: all killings are directed at hypocritical and decent people, and innocent mortals/pure good people are never harmed. Readers are full of empathy, and acts of revenge are completely "relieving"
Strength development: From being alone to integrating the Ten Thousand Demons Cave and Netherworld Palace, establishing the Devouring Dao Abyss, competing against the Tianji Alliance, and finally becoming the rule maker of the world of immortality