Demonic Return

Demon Lord Donicova ruled a land called Guillition Empire. The land he ruled was a continent. He ruled benevolently for 3000 years until his most trusted allies turned on him and he perished. He is reborn into a world of that we would consider unrealistic and game like. He is reborn into a dying young boy named Moar Zaek. Moar Zaek has given Demon Lord Donicova a mission of revenge. Will the new Moar Zaek be able to complete his mission? How will he adapt to this world as a LEVEL 1 MAGE?