I Have a Xuantian Sword

"Xuan Tian, refine some materials for me." "I want..." "No!" "Then I want to..." "No!" Xuantian Sword:...... "Xuan Tian, help me kill someone." "I want..." "No!" "Then I want to..." "Stop talking nonsense! Let's get to work!" Xuantian Sword:...... Chen Han, who traveled through time, encountered a so-called Xuantian Sword preserved from ancient times, and strange things happened.