Villain: a Man Who Occasionally Goes Crazy!

What would a mentally ill person do when he traveled into a fantasy world and became the villain, the Son of God? Naturally, he declared crazily to those self-righteous and self-centered protagonists: "Hahahahahaha..." "Their screams~ will be like the faint chirping of insects at dusk!" "Their elegy~ should sing my name~" "I should settle your accounts!" "You think you can kill me!!!" "Feel my pain!" "Ha↘ha↘ha↘ha→ha↗" Or he is holding a long knife and waving it wildly, roaring like a mad dog: "Ah! Fight!" "Otherwise it will be forgotten!" "Protagonist, you deserve to die!" "Come! Let me kill you a thousand times and it's not enough!!!" "Cut! Cut!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.