魔獣の軍勢

From Author Wars - https://authorwars.com/books/mo-swu-nojun-shi-2832414.html

Overview:

Title: 魔獣の軍勢
Author: 迷井豆腐
Year: 2017
Type: Novels
Series: 黒の召喚士 / Black Summoner
Number in Series: 3

Variant Titles:

2021. The Army of Monsters