Judged

The Judged are a group of 30 Space Marine Chapters who were judged as impure by the false Saint Basillius the Elder and sentenced to undertake the Abyssal Crusade, a redemptive crusade into the very heart of the Eye of Terror. Of the thirty who went in, only one escaped with its purity intact -- the Vorpal Swords chapter -- and over the eight centuries of the crusade all of the other 29 were corrupted into Chaos-worshipping Renegade Marines of various natures.