Villain: Starting from the Tang Family, Slaughtering the World

[Revenge, a madman slaughters all the people in one day] [Not a super-defying system, kill people to become stronger, travel through all the worlds] [Determined killing, ruthless methods, the Holy Mother is not allowed to enter] [No heroine, no woman in the heart to draw the sword and the natural god] [Restraint skills, slightly spiritual pollution] [Invincible at the same level, you can cross levels, invincible without appearing, and gradually become stronger] I, Gu Yuan, am a ghost, evil, and demon! I, Gu Yuan, will kill the third young master of the Tang family! Out of revenge, there is no end to the killing, whether it is the main world or the various weird heavens and realms. I am the most evil demon in the world! The body and mind are already bruised, so why not slaughter everyone in the world! The alien world I am currently experiencing: the magically modified Pleasant Goat and Big Big Wolf Little Thousand Worlds.