The Most Powerful System - Violent Upgrade

Have you ever seen an upgrade system where killing monsters will level up, killing people will level up, and even picking up girls will level up? Liu Hai, originally a hardcore gamer, traveled to a different world with the most powerful violent upgrade system in history. Killing monsters will level up, killing people will level up, and picking up girls will also level up. Crush three thousand worlds... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.