Niko and the Sword of Light
Amazon's description of the show: "A plague of shadows has swept across the land, turning innocent creatures into terrible monsters. One champion remains to battle the darkness and return the world to the light: Niko. Armed with his magic sword and guided by a determined Princess, young Niko must journey to the Cursed Volcano, defeat evil sorcerer Nar Est and free his people from their magic prison."
Ages it's best suited for: 6 and up
Number of seasons: 3 (Season 1 and episodes 201-202 included with Prime)