Martial Arts! Clear Away the Turmoil in the World

(The male protagonist's brother has a cool script + the female protagonist's sister kills both men and women) The protagonist's family provoked local powerful forces due to a series of incidents, and the whole family except the protagonist was killed one night. By chance, the protagonist obtains ancient magical powers. From then on, we embarked on the road of supporting justice, hoeing the strong and supporting the weak.