Immortality: Transform into a Demon at the Beginning and Kill the Demon-Suppressing Guards Angrily

[Decisive killing + lone wolf + no heroine + system] Fang Xiu traveled to the Daqian Dynasty and became the eldest son of the wealthy businessman Fang family. In order to obtain the Fang family's property, the county magistrate teamed up with the demon-suppressing guards to frame the Fang family for colluding with demons, absorbing demon blood, etc. As a result, everyone in the Fang family except Fang Xiu was killed. In order to save his life, Fang Xiu had no choice but to agree to give up his family property. However, the county magistrate and the demon-suppressing guards were unwilling to let him go and wanted to eradicate the roots. Forced into a desperate situation, Fang Xiu awakened the system, absorbed the demon blood, transformed into a demon, and killed the demon-suppressing guards and the county magistrate. Since then, he has embarked on an invincible path to immortality where gods can kill gods and Buddhas can kill Buddha. (My name is Fang Xiu, and I will stay until death.) (Everyone is running towards the self-righteous light, but they don't know that there is a sea of fire ahead.) (Everyone laughed at me for walking into the darkness, but they didn't know that I was about to usher in the dawn.)