This Upgrade Method Is Unfair

Lu Zhou traveled to a world where spiritual energy was revived, and a bug appeared when binding the Super Star data system. [Suffering respect from teammates, upgrade experience -3. [Suffering persecution from cultivation, upgrade experience -2. Attack the villain BOSS. [Hit the target, and the opponent loses -100 HP. [Host upgrade experience -100. … Mist grass! This BUG system is poisonous! Wait... [Suffering contempt from teammates, upgrade experience +2. [Suffering resistance from cultivation, upgrade experience +3. [Suffering intimidation from the enemy, upgrade experience +5. … There are bugs to be exploited in this BUG system!