These cassettes amongst other things, introduced the world of Anti-Eternia, with an evil alternate universe version of He-Man.
Here's a little translated transcript.
Anti-He-Man: He-Man! He-Man! Take up the challenge and fight me!
Skeletor: By all terrors of hell That's Anti-He-Man! He challenges you He want to fight with you.
He-Man: And I will not hide from him! Quick, you have to[...]
