Fantasy, Get the Invincible Little Attendant at the Beginning

This is an era I don't know when, Spiritual practitioners are superior to others. Without strength, my fiancée was almost robbed. But my life should not be cut off, I also got an invincible and obedient attendant, Who is still acting wild? If the boss doesn't show off his power, do you think I'm a fool? You are used to calling the shots in this world, and I am tired of seeing it... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.