Isekai Onmyouji to Juuni Tenshou no Shikigami

The strongest onmyouji of all time, who mastered all onmyoujutsu and had the shikigami of the Twelve Heavenly Generals under his command, was betrayed by a relative and met a tragic death. However, just before his demise, he is reincarnated into another world. The strongest onmyouji becomes Wayne, the third son of a senior aristocrat from another world. In the fantasy world after reincarnation, "magic" is widespread, and one's status is determined by the presence or absence of magical power. Of course, no one knows about onmyoujutsu or shikigami. Wayne had zero magical power and no magical talent. However, his onmyoujutsu talent inherited from his previous life is the best in the world. With mastered onmyou techniques and the strongest shikigami, Wayne, who is "supposed to be incompetent," can accomplish anything. The curtain has now risen on a parallel world dominated by the "strongest onmyouji," far surpassing the common sense of people for whom "magic is everything." (Source: HykeComic, translated)