Heavenly Master Ancestor's Corpse Transformed? I Really Didn't Mean It!

This is a world filled with ghosts and monsters. Fortunately, Zhang Haoran time traveled to the body of a heavenly master's son. But just a few days after time travel, Tianshi's father went out to slay demons. "Dad! What will I do if you leave! I just traveled through time and can't do anything!" Zhang Haoran was stunned. His father had just disappeared after traveling through time. Fortunately, Zhang Haoran awakened the system at this time. (Novice task: Refining an Inferi, click to accept the task to complete, Mission rewards: "Sword Controlling" and "Corpse Tower") "Zhou Cao! With such a stupid system, how could you turn my Heavenly Master ancestor into a Yin Corpse!" "It's over! If my father finds out about this, I will be completely doomed!" "What a cheating system! If you can't train anyone well, why did you train my Celestial Master ancestors!" Zhang Haoran looked at his ancestor Zhang Longling who had been transformed into an infernal corpse and was about to cry without tears.