Accidentally Joined the Demon Cult Manga

Zhao He has been transmigrated to a world of cultivators, without Cheat! He utterly had never thought that he might be possessed by the remnant soul of the ancient demon lord even while he was hiding inside the grass, but they fused, two souls living together in one body! If the cultivation foundation is not enough, the Demon Monarch occupies the body and forcibly cultivates the demonic energy, breaks through directly. There are not enough resources for cultivation, so the Demon Monarch forcibly seizes the treasure. As there was no Taoist companion, and the demon Monarch directly took over the Saintess of the top demon cult as the furnace. Zhao He said, I am really a good person!

Accidentally Joined The Demon Cult - Chapter 2

Hakuto Kunai, Demon Lord, Retry! Wiki

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Accidentally Joined The Demon Cult - chapter 0 (Not worth reading) - Kissmanga

Can you please give me anime/manga/manhwa/manhua suggestions where MC is badass and somewhat like Rimuru Tempest of That Time I Got Reincarnated as a Slime? - Quora