Can you get a unicorn from a Retired Egg?

I'm curious, is it possible to hatch a unicorn from a Retired Egg? I've heard rumors that these eggs hold rare and magical creatures, but I'm not sure if a unicorn is among them. Do you have any experience with Retired Eggs or know if they can actually produce such a mystical beast? It seems like an incredible feat, but I'm eager to learn the truth behind this intriguing question.