Reborn as the King of Hell: Taking In a Thousand Eerie Beings from the Start

[Power fantasy + Invincible + Villain + No holier-than-thou protagonist + Behind-the-scenes mastermind] In a world overrun by the supernatural, a mysterious entity called the King of Hell appeared out of nowhere and shattered the balance of power between the supernatural and humanity. From then on, a saying spread among the people: "The King of Hell says you die at the third watch, and won't let you live until the fifth." A year later, this King of Supernatural Beings arrived in the island nation. In less than half a day, the island nation tearfully declared, "We don't even have time to mourn Mr. Seimei. Up next is..."