Tonton Streaming He-Man and the Masters of the Universe (2002) S1E7 - Lessons

Embarrassed by his mixed-up magical spells, a dejected Orko strays from the Royal Palace. Meanwhile, Skeletor orders Evil-Lyn to steal a powerful artifact known only as the Ram Stone. Evil-Lyn must face her past in retrieving the object, just as a mysterious figure inside Castle Grayskull shows Orko just how important he is in the lives of his fellow Eternians. It is not long before Skeletor has the Ram Stone containing magic strong enough to transform He-Man back into Prince Adam!