This is lame. There is a difference between a cunning and smart MC and an arrogant one. This MC is the latter. He is just arrogant for the sake of it. He is strong because he was the first killer in the world or whatever. And of course he has a magical item that helps him soars through levels. He was using gus in his previous life but seems to know everything there is about cultivation so I'm a bit confused. As for the plot.. well there is none. He lives in a family who happens to have many enemies so of course they will come get a beating from MC every now and then. That's basically it. Beat and get beaten, on repeat.