Ultramarines - Exile of the Lion: While Lion El'Jonson continued his obsessive hunt for the elusive Night Haunter, he and Roboute Guilliman continuously clashed over policy, especially in regards to the security of Imperium Secundus. They were particularly vexed with how best to deal with the emergence of rebels on Macragge that the Lion was certain Curze had instigated.Following a suicide bombing of an Astartes convoy by these rebels, the Lion used the I Legion to establish martial law on Macragge. Certain that Curze was hiding within the rebellious Illyrium region of the world, the Lion advocated the use of a massive orbital saturation bombardment of the region to ensure Curze's death. Facing resistance from both Sanguinius and Guilliman, who objected to the civilian casualties such an action would unleash, the Lion instead opted to deploy his Legion's Dreadwing in order to flush out Curze and the rebels.During an attack on the city of Alma Mons, the Lion finally cornered the elusive Night Lords primarch and the two came to blows. After a brutal confrontation, the Lion eventually emerged victorious, and questioned his brother why he had turned away from the Emperor, to which Curze simply replied: "Why not?"Curze went on to explain that there was a monster in his head that he could not stop. Though he finally had Curze at his mercy, the Lion couldn't bring himself to kill his brother, and instead pummeled him again. He then ripped off Curze's backpack from his battle-plate, lifted him over his head, and brutally brought the Night Haunter down across his knee, breaking Curze's spine and paralysing him. The Lion brought the grievously wounded Konrad Curze before Sanguinius and Guilliman to stand trial.A Triumvirate was later called by the three Loyalist primarchs where Curze defended his actions, but refused to admit his guilt. Since each of the primarchs had been created to perform a specific military function, Curze argued he was merely acting according to his own Emperor-granted nature, and therefore had committed no crimes. The Night Lords primarch further divided Guilliman and the Lion by accusing the latter of secretly ordering an orbital bombardment of Macragge in direct violation of Guilliman's orders to prevent civilian casualties.Enraged at the accusation, the Lion sought to kill Curze, but was halted by the words of Sanguinius as Guilliman snatched El'Jonson's Lion Sword and broke the blade across his armoured thigh in his fury at the Lion's actions. El'Jonson was furious, but Sanguinius dismissed the Lord Protector, ending the Triumvirate. The Lion was then banished from Imperium Secundus for ignoring the authority of his fellow primarchs. Taking his leave, the Dark Angels Legion withdrew from Macragge only solar hours later.Standing in the chamber of the Tuchulcha Engine aboard the Invincible Reason, the Lion brooded over recent events. He questioned his actions over the course of the last few solar decades -- the banishment of Luther, the death of Nemiel as well as other decisions he had come to regret. As the Dark Angels made their final preparations to depart back to Caliban, the Lion went back to the Tuchulcha Engine's chamber. He ordered the device to teleport himself and Holguin, "Deathbringer", the voted-lieutenant of the Deathwing, back to Macragge.As Sanguinius prepared to execute Curze for his crimes, both the Lion and his lieutenant teleported directly into the chamber and told Sanguinius to stop. As troops entered the room, demanding the Lion surrender, El'Jonson explained his reasons for the intrusion. He reasoned that Curze had the ability to see precognitive visions of potential futures, and repeated the Night Haunter's claim that his death would one day come at the hands of an assassin sent by the Emperor. If this was true, the Lion reasoned, then it was proof that the Emperor was still alive beyond the barrier of the Ruinstorm.Sanguinius knew the Lion's explanation rang true, as he recognised that his own precognitive visions of his inevitable death would also eventually come to pass. When Guilliman demanded to know what would become of Curze, the Lion knelt before his two brothers and promised that he would be Curze's gaoler.