There were many mangas similar to Black Deacon. Here are some recommendations: 1 Death Note-This is a manga created by Japanese manga artist Kazuma Kamike. It tells the story of the protagonist, high school student Yasuko Tachibana, who finds a notebook that can kill and uses it to solve a case. 2 Demon Slayer-This is a manga created by Japanese manga artist Ishikawa Hideki, which tells the story of the protagonist Amato Kaito and the demon hunter Sawonji World. 3 Dante's Blood-This is a manga created by the Japanese manga artist, Chihiro Ayari, which tells the story of the battle between the protagonist, the vampire Kaido, and a human hunter. 4 Black Blade-This is a manga created by the Japanese manga artist, Shokuyama, which tells the story of the protagonist, Charles, and the deacon, Sebastian. 5 "The Hunter"(H Hunter)-This is a manga created by the Japanese manga artist, Chihiro Ayuri, which tells the story of the battle between the protagonist, Kaido, and various monsters.