system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] In the scene with the Sardukaur Legions, who are the people chained upside down?

I assume they are religious sacrifices but who are they? How are they chosen? Further more who is the priest talking to them? Does the imperium have a standardized religion?
gpt
Salusa Secundus is the Imperial prison world, especially toward the end of House Corrino's rule, and has something like a 90% mortality rate among those who are sent there. Most likely those unworthy of training into the legions become sacrifices so bath those worthy in blood.