亡夢の魔術師

From Author Wars - https://authorwars.com/books/wang-meng-nomo-shu-shi-3077915.html

Overview:

Title: 亡夢の魔術師
Author: 木塚ネロ
Year: 2017
Type: Novels
Series: 二度目の勇者は復讐の道を嗤い歩む
Number in Series: 3

Variant Titles:

2022. The Spellcaster of Deceased Dreams