Some people are trying to unlock the Heart of Nightmare map, which allows you to play it even without the collector's edition. You can read more about it here.
So, I have a question. I'm very grateful for the opportunity to play this map, but I'm asking those who also used the second method. Did you also encounter a situation where, at the beginning of the map, Svetlana was replaced by a hero named Temp Avatar without a portrait? This was quite unpleasant and detracted from the overall experience.
I enjoyed the map itself, although it's very short. It features two bosses (Hai Ro and Mother Namtaru), and you can find the Dynasty artifact, the Staff of Purity. The plot is quite interesting, and it would be great if there was a bonus of four "exclusive" heroes – Agirre, Svetlana, Yume, and Akasha – who are the main characters in this mission.