Khrave

The Khrave are a dangerous species of psychically-gifted xenos that has repeatedly clashed with the forces of the Imperium. They are a plague that prey on human worlds, enslaving entire populations to feast on them and strengthen themselves. In the days of the Great Crusade, it is said that some of the largest of the Khrave had grown terribly strong, surpassing the strength of the Space Marines and even rivaling the bulk of the mighty Primarchs of old, although perhaps thankfully for the Imperium, no such monstrosities have been encountered in recent years. The Khrave are an old species and count amongst the most ancient xenos threats known to Humanity. While it is unknown if Humanity did encounter them during the first conquest of space in the Dark Age of Technology.