Slay Demons in Search of Immortality, Kill the Vixen at the Beginning

[Comfortable text + upgrade + no female protagonist + decisive killing + no taboos] The first thing Qin Chuan did after he was reborn was to kill a vixen. In a time of troubled demons and hardships for the human race, Qin Chuan traveled through time and became a wealthy young man, but his family was wiped out by demons within three days. After rebirth, he awakens the demon-killing and immortality system, kills creatures, obtains aura, deduces skills, and plunders magical powers. Killing demons, Qin Chuan relies on the system to find immortality.