Temple Tendency - Age of Apostasy: As the Adeptus Ministorum bloated with secular power, its need for wealth to sustain its holdings became an insatiable hunger. Huge tithes levied with the authority of the ecclesiarch pushed worlds into open rebellion. The Frateris Templar punished such defiance without mercy, with planetary governors and their officials burnt as Heretics for defying the Emperor's will. Entire populations were decimated to drive home the lesson that those who did not bow to the Ecclesiarchy would find death their only reward. The lesson was not heard.As rebellion spread across the galaxy and the wrath of the Ecclesiarchy grew, Warp Storms blew up out of the depths of the Immaterium and the burning Imperium was blinded. Thousands of star systems were completely isolated, travel between all but the most local systems became impossible, and the psychic messages of astropaths became desperate shrieks at the rising maelstrom.Anarchy boiled up across the Imperium. Rogue zealots led thousands in turning their worlds into funeral pyres where cults and sects spawned and struggled in a cloud of blood, dragging Mankind down into dark nightmares of extermination perfumed with the smell of burnt flesh. The few pitiful worlds still open to Warp travel became the focus of the Ecclesiarchy's attempt to assert its authority on a dream that had gone astray. Millions lay dead at the hands of the Frateris Templar.The storm had broken, but the initial anarchy of bloodletting was only the harbinger of worse to come. As the Ecclesiarchy rose to its position of near-supreme power in the Imperium, it was in constant struggle with the Adeptus Administratum -- the balance of power shifted several times between the two great organs of the Imperium but neither achieved decisive control over the other. However, as the Imperium began to pull itself apart, one man would break the deadlock.That man's name lives on in infamy down even to the current age. He became both master of the Administratum and ecclesiarch, a tyrant whose rule would be called the "Reign of Blood" in an age already mired in conflict. The name of the man who came as close as Horus to destroying the Imperium was Goge Vandire. His dark reign was a time of absolute authority executed without restraint or sanity, where worlds were virus–bombed at whim and vast armies mustered to destroy Imperial subjects for suspected or imagined sedition.At the last, it took the forces of the Mechanicus, Astartes, and the rise of one of the greatest Imperial Saints ever known to bring down Vandire. The man who broke Vandire's power and later became ecclesiarch, reformer of law, and after death was declared foremost among Imperial Saints was Sebastian Thor. Thor was the leader of the Confederation of Light, a rival cult declared heretical centuries before by the Temple of the Saviour Emperor.He was imbued with great charisma and vision but was also supremely humble and, if the current creed is to be believed, performed miracles by the God-Emperor's grace. High Lord Goge Vandire was to die under the sword of his once most loyal servants and thereby be immortalised in infamy. Usurper and corrupt though he may have been, Goge Vandire was the last ecclesiarch of the Temple of the Saviour Emperor. With his end also came the end of the Temple's dominance of faith in the Imperium.