竜王の加護

From Author Wars - https://authorwars.com/books/long-wang-nojia-hu-3212465.html

Overview:

Title: 竜王の加護
Author: 迷井豆腐
Year: 2020
Type: Novels
Series: 黒の召喚士 / Black Summoner
Number in Series: 13

Variant Titles:

2023. Blessing of the Dragon Kings