The Sword Seals Thousands of Miles

There is a prince who has an army of 500,000 and wants to destroy two countries and unify the continent; There was an old man on the mountain who wanted to beg instead of being the master; There is a heroine who rides a donkey and holds a machete; There was an emperor who loved to practice martial arts and wanted to learn from the common people; In this world, everyone lives in the human world and is also in the arena. The court needs sects, and sects need to curry favor with the court. The protagonist, with two swords on his waist, wants to penetrate this other world!