They Are All Heretics, Why Are You Covered in Holy Light?

[Light novel style Western fantasy theme] [Sword and magic light and funny] Ron traveled to the world of the game "Endless Abyss" and became the hidden boss Nightmare Baron. The good news is that Nightmare Baron will have unparalleled combat power in the future and will be the lifelong enemy of speedrunners. The bad news is that the Nightmare Baron is now weak and about to face 50 years in prison. On the first day, Ron was given a devil's heart by a heretic, and people called him a tainted devil's son. Three years later, Ron became the Holy See's top law enforcer, and people called him the brave Knight of Light. Ten years later, Ron killed the Pope and took charge of the empire. People called him the great head of the empire. … "As the leader of the heresy crusade, the youngest pope of the Holy Church of Light, and the dream of 900 million girls in the Blue Feather Empire, what do you want to say to your followers?" Facing the reporter's interview, Ron said slowly, "Are you willing to sacrifice your lives for your beliefs?" … Many years later, watching the overwhelming news about Ron changing the world, the heretic saint of the Abyss Vatican, the archbishop of the Upside Down Court, the uncrowned king of the Fallen City, the Lord of the Undead in the Bones... The villain leaders of all walks of life fell into deep thought at the same time. "They are all heretics, why are you the only one who has the Holy Light Universal?" This book is also known as "Don't worry, the villain boss is not ready yet" and "I have a villain boss friend"