Hektor Cincinnatus
Hektor Cincinnatus, the Warmaster, Primarch of the Heralds of Hektor
Hektor's great mistake was to live too long. Had he died on Cadia to the assassin's blade, he would have been remembered as a martyr and great hero of humanity. Instead, he spent thirteen unhappy years unravelling his life's work and sowing destruction through the galaxy. All that is left of my love for Hektor is the wish that he be forgotten.
(Gaspard Lumey, private correspondence)
The Emperor was far from his Palace when the Ruinous Powers tore open reality to steal away the infant Primarchs. However, his great mind still sensed this intrusion, and he hastened his most-faithful servant, Malcador the Sigilite, to the defence of humanity's future. Braving the terrors of the Warp, Malcador was able to grasp the capsules of two Primarchs: Hektor and Kleisthenes. Yet this interruption of the Chaos Gods drew their wrath, and the Sigilite's flesh and spirit were flayed by their power. Only the psychic protection of the distant Emperor kept Malcador from perishing. Weakened, he faced the terrible choice to let one more of the infant Primarchs go or to lose them both - and perhaps himself.
As the child that would become Kleisthenes tumbled into the Immaterium, he and the infant Hektor wailed and reached out towards one another from within their capsules. Even then, the ordeal was not at an end. Malcador, trembling from the strain, was assailed by temptation from the Chaos Powers. He was offered release from his agony and so much more, to be placed as the Regent of the Humanity, the Most-Favoured of the Gods, if only he would release his grip. Malcador wavered, but his belief in a better, rational future for mankind stayed firm. So did his grip on Hektor's capsule.
Though the Ruinous Powers had inflicted a terrible blow against the Emperor, Malcador's courage and strength had secured a consolation. Instead of thirty mighty Primarchs to launch Terra's Crusade there would be just one, perhaps some day to be joined by his brothers.