Our hero, our hero, claims a warrior's heart. I tell you, I tell you: the Dragonborn comes; with a voice wielding power of the ancient Nord arts. Believe, believe: the Dragonborn comes.
Oh no, it's an in-game bard song called "Dragonborn Comes". Found a cover recently by a girl calling herself "Malukah", and it is beautiful. Can't link to it, but go search it up.