Start with Demon Slaying and Sacrifice

When he woke up, he found that he had become a demon cultivator with great magic skills. Lu Ming found that he was very, very strong. Almost invincible, but not completely. Tiangang Dao method, earth evil method. The secret of martial arts, the elixir and the talisman. Lu Ming learned everything above and could obtain it by killing demons and offering sacrifices... Invincible, starting from slaying demons and offering sacrifices...