Magi: Sindbad no Bouken (2016)

In the prosperous empire of Partevia, a boy named Sinbad is born one day, destined to overturn the world and become the King of the Seven Seas.
From a poor family, Sinbad lost his father, who was sent to the front, and he provides for his household as his mother suffers from an illness. His encounter with the traveler Yunan will mark a turning point in his life and prompt him to explore the Dungeons, mysterious structures that, according to legends, contain treasures and power.