I Have Become a Demon Cultivator. Isn't It Normal Not to Eat Beef?

[Devil cultivator + pure villain + commit all evil + cold-blooded and ruthless + decisive in killing + old six in the early stage + don't eat beef in the later stage + kill, kill, kill + no system] [The male protagonist is a normal man, with a woman but no feelings] Some people are born in Rome, while others are born as cows and horses. This world is so unfair. Even if ordinary people try their best, they can only reach the starting line of the children of aristocratic families. Huairen's reincarnation skills were not very good, and he was born like an ant with no resources, no opportunities, and even no family. Without resources and opportunities, how can we compete with those geniuses who were born in Rome? Huairen smiled calmly: It's very simple. Just kill them all and seize all the resources and opportunities! Genius? A kid from a famous family? Destined person? It's you I'm going to kill!