Sister, Please Forgive Me, I Am Really the Master of the Excalibur!

My sister is an ordinary, one-in-a-billion evil genius in swordsmanship. As an older brother, I am just an ordinary swordsman. Without a father or a mother, we can only rely on each other for survival. When someone bullies us, we can only politely kill each other. We can't tell others if we have any grievances. They didn't understand our feelings and always said that I was pretending to be a pig and eating the tiger. Can you blame me? I don't want to kill the Star Lord with one sword, and I don't want to stab the quasi-god to death with one sword! I don't want to be so plain and simple. But the divine sword in the body does not allow it. It does not allow fancy sword skills, swordsmanship, sword intention, etc. To override it and use its energy. Stop bullying me, okay? Go bully my sister if you can! Ying Ying Ying!