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The Sisters of Parvos are effectively Corpus Kuva Liches, with a few differences at the start and end of the process. The all-female elite unit was created from the childhood daydreams of the Corpus’ founder. The Sisters aren’t accompanied by Thralls, they have Hounds, robotic creations that have their own special abilities. If you need to know how to get them to spawn, how to fight them and how to defeat them permanently, this guide will see you through.