The New Adventures of He-Man S01 E20 Fading Star

The Galactic Guardians investigate a destroyed ship orbiting Primus and find a Hibernation Capsule containing Dukan who is one of the greatest heroes in Primus' past. Skeletor challenges Dukan to a duel in an abandoned city on Denebria. Suspecting trouble, He-Man, Hydron, and Flipshot secretly follow Dukan.