Blaktoof is a powerful Ork Warboss, holding the position of the Overfiend of Octarius as of 989.M41. As the ruler of the Ork Empire of Octarius at the time of its invasion by Hive Fleet Leviathan, Blaktof utilized the services of Boss Zagstruk against initial infiltration parties of Genestealers. Though they prevented a Genestealer infestation, a full-scale Tyranid invasion of the Empire of Octarius soon took place anyway and Blaktoof launched a full-scale Waaagh! straight into the Hive Fleet. His status since is unknown.