I apologize ahead of time if this is not the right subreddit to ask this question. We cannot seem to find a solid reference that gives us answers.

My SO is doing research on the Zduhac, a Slavic/Serbian historical mythology about people born with supernatural abilities who used those powers to protect their estates when asleep via some form of astral projection (apologies; I am paraphrasing).

However, we are having a hard time finding any resources or anyone who may be an expert on the matter. I'm usually pretty decent at researching, but even I'm stumped on this one (I am also not very proficient with the languages that we do find information on!).

Does anyone have any historical information or even references/resources that would tell us in better detail the origins of the Zduhaci and any other information that would be helpful?

Thank you in advance for any assistance offered.