Shokei Sareta Kenja Ha Rich Ni Tensei Shite Shinryaku Senso Wo Hajimeru (Ga Ga Ga Books) [Light Novel]

[Machine Translation] Dwight the Wise, who together with the heroes defeated the Demon King. They were supposed to have brought peace to the world, but they were suspected of planning to become the next Demon King and were thrown into the Valley of the Dead, where they lost their lives. Ten years later. Dwight, who had lost his physical body, became a skeleton and lived on quietly at the bottom of the valley. Tormented by deep remorse, he holds the corpse of his hero and asks himself, "How could I have done this to him? He came to a conclusion. It is the world that is wrong. Dwight made up his mind and ate up the miasma of the Valley of the Dead. He became a being surpassing the former demon king and led countless undead to the earth. All for the sake of true world peace. -The Immortal King, now the most powerful of all, begins his war against mankind.

勇者と共に魔王を討伐した賢者ドワイト。世界に平和をもたらしたはずの彼らは、次代の魔王になるつもりだという疑いをかけられ、死者の谷へと突き落とされて命を落とす。それから十年後。肉の身体を失ったドワイトはスケルトンとなり、谷底でひっそりと生き永らえていた。深い後悔に苛まれる彼は、勇者の亡骸を抱いて自問自答する。そして、一つの結論に達した。「間違っているのは世界だ。私が否定しなければ」決心したドワイトは、死者の谷の瘴気を喰らい尽くした。彼はかつての魔王を凌駕する存在となり、無数のアンデッドを率いて地上を目指す。すべては真の世界平和のため。―最強の力を得た不死の王は、人類を相手に戦争を始めるのであった。