What Do I Do Now That I'm Number One Under Heaven?

I transmigrated into a book.

I didn't become the protagonist.

I became the villain.

So I took everything the protagonist had.

Before I knew it, I was the greatest under heaven.

What's next after becoming the greatest under heaven?

Destroy the world?

First-person POV. [I] am mentally ill, the kind who chops people up at the slightest provocation. The CP is the protagonist.

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