The Blood Raider Covenant is a particularly gruesome sect of the generally reviled Sani Sabik cult. While all modern Sani Sabik rituals use blood in some manner or another, the Covenant places particular value on the blood of cloned humans, and is utterly ruthless in obtaining it, regularly boarding other spacecraft and abducting all aboard. From their base in Delve they launch lightning raiding parties and surprisingly well co-ordinated incursions deep into Empire space in pursuit of their goals.