Corbulo is the Sanguinary High Priest of the Blood Angels and the keeper of the Chapter initiation mysteries for Neophytes. He is charged with the wardenship of the Red Grail, the artefact in which the blood of Sanguinius was preserved after the Primarch's death. This vessel is a key part of the induction mysteries of the Sanguinary Priests, but it is also a potent relic upon the field of battle, exhorting the Scions of Sanguinius to greater deeds. The physical resemblance borne by Corbulo to the Blood Angels' lost Primarch is uncanny, as his piercing eyes and noble aspect reflect the nature of the Blood Angels at its most pure. In the centuries since his investiture, it is perhaps this perfection that has driven the Sanguinary High Priest to work ceaselessly to isolate and neutralise the