The Reincarnated Sage who was abandoned ~I will create the strongest Demon Empire in the Demon Forest~Suterareta Tensei Kenja ~Mamono no Mori de Saikyou no Dai Mateikoku wo Tsukuriageru~; Suterareta Tensei Kenja ~Mamono no Mori de Saikyou no Dai Mateikoku o Tsukuriageru~; The Abandoned Reincarnation Sage: I Will Create the Strongest Demon Empire in the Demon Forest; Реинкарнация мудреца ~Создание самой сильной империи в лесу демонов~; 捨てられた転生賢者~魔物の森で最強の大魔帝国を作り上げる~; The Reincarnated Sage Who Was Abandoned - I Will Create the Strongest Demon Empire in the Demon Forest; The Reincarnated Sage ~ I will forge the strongest empire in the Demon Forest!~
At his death, the great sage used the new magic he developed to reincarnate into the future. However, he was deemed to be talentless and abandoned in the forest of monsters where he was picked up and raised by goblins. To repay them, he helped them evolve and taught them magic. The story of the abandoned child who will build what would be known as the great empire of monsters. (Source: Mangaupdates)