Villain: Kill Through Other Worlds and Dominate the World

(Chinese-style Western fantasy + Machiavellian strategy + more than a dozen female protagonists and a sinister villain without a system) In this world where the "monster race" is respected, the secondary races of "devils, ghosts, and monsters" can only find a way to find a world through the cracks. Why are we, the demon clan, inferior to the demon clan, and why are the demon clan with no ability at all ruling this world! I don't accept it! I want to change this situation! So I peeled off the skin of the heir to power, put it on myself, and climbed up the ladder under his false name. Anyone who stands in my way - kill! Anyone who prevents me from ascending to the throne - kill! Anyone who disobeys me - kill! In the end, I gained power, destroyed the demon clan, suppressed other races, and unified this land. This world was renamed after my race and was called the "Devil World"! (I am a stupid author who doesn't know how to use a computer or AI, and can only write by hand on my mobile phone. I write slowly, so please bear with me.)