The Great Martial Arts Xiaoyao

This should belong to a world of high martial arts. There are people here who can move mountains and seas, and there are people who can kill people invisible. This world is full of swords and shadows, but also the worldly wisdom. ⋯⋯⋯ I came into this world with only a knife, a master, and a junior brother. The master died, so there was only a knife and one person left in my world. If that person disappears in the future, then there will be only one knife left in my world, and this knife will be used to avenge that person. From a modern urban ancient times, a wandering swordsman gets a system, what kind of sparks will be created.