After Time Travel, My Proficiency Exploded

[Proficiency panel + martial arts sanctification + kill, kill, kill! ! ! Traveling to the Dayan Dynasty, a world where gangs, aristocratic families, and clans abounded, and demons danced wildly. Gu Kai just wanted to protect himself, avenge his sister, and be filial to his parents. The proficiency panel just gave him the confidence to collect two certificates and break the limit three times. Not good at all? Fine! [Eighth-grade mortal bones]→[Seventh-grade stone roots] The level of martial arts is too low? It's okay! [Fuyun Palm Proficiency +1] ……… A few years later, Gu Kai relied on his liver-exploding proficiency to become the strongest martial saint in the world!