Prophecy.Set 10,000 years before the birth of Paul Atreides and his rise as the prophesied messiah known as Lisan-al-Gaib, HBO's new Dune: Prophecy series chronicles the early evolution of the Bene Gesserit order from a fledgling school for gifted young women to the superpowered mystical sisterhood that's pulling the strings of the imperial government at the start of Dune.

"Dune: Prophecy," a prequel to the Timothee Chalamet movies, has a big ensemble cast and lots of moving parts. Here's everyone you should know.

The warning accompanies a vision of the Sisterhood's destruction, suggesting that whatever Tiran-Arafel is, it's nothing good. Dune: Prophecy confirms this in the very next scene, when young Sister Valya Harkonnen (Jessica Barden) informs her fellow Sisters of Raquella's words.