One of the coolest tools that Dragnacarta introduced into CoS:RRL is the concept of the Barovian Relics: DMs can, if they opt to do so, use these simple and fun character-driven tools to draw player characters into and around the cursed realm of Barovia. I don't want to give away too much (you can read the free version here to learn how to use them) but they were fun to draw and hopefully you'll find them fun for you to include in your home game.