Lucius the Eternal - Angel Exterminatus: Lucius would later take part in the joint expedition comprised of both the Emperor's Children and the Iron Warriors Traitor Legions into the Eye of Terror to seek out the forbidden xenos weapon known as the Angel Exterminatus. It had been hidden in the grave of its doom, a weapon of such power that the stars themselves turned upon it rather than allow it to escape its prison. The destination of the joint fleet of Iron Warriors and Emperor's Children vessels was the lost Aeldari world of Iydris, a world said to have been favoured by the goddess Lileath.Iydris was one of the legendary Crone Worlds, which once formed the heart of the lost Aeldari Empire before they were consumed by the creation of the vast Warp rift that was the Eye of Terror following the birth of Slaanesh in the early 30th Millennium. The lost world was located at the heart of the Eye of Terror, somehow remaining in a fixed position keeping it from destruction in the gravitational hellstorm of a supermassive black hole that lay at the centre of the eternal Warp storm.Their ultimate goal was within the primarchs' grasp; the Sepulchre of Isha's Doom, which sat at the centre of the citadel of Amon ny-shak Kaelis. But Fulgrim had lied to his brother primarch Perturabo, for in reality the reason they had come to the Crone World was so that the Emperor's Children primarch could achieve apotheosis and become a Daemon Prince. During an epic climactic battle within the Sepulchre of Isha's Doom, Lucius fought against a multitude of Aeldari Wraith constructs as well as their former comrades from the Iron Warriors. During the climax of the battle, Lucius also faced a small Loyalist force from the Sisypheum, an Iron Hands vessel that had survived the destruction of the Drop Site Massacre and fled, waging a guerrilla war against the forces of Horus. They had tracked Fulgrim to this benighted place, intent on thwarting whatever foul plans he intended to carry out.Lucius was once again confronted by Nykona Sharrowkyn, a surviving battle-brother of the Raven Guard Legion. He had faced the Loyalist Astartes on the world of Hydra Cordatus, where the Raven Guard and a fellow Loyalist had attempted, and failed, to assassinate Fulgrim. Fighting with twin black swords extended before him, the Raven Guard sprang to the attack. Arrogantly, the corrupted swordsman believed that no one could possibly best him. Sharrowkyn proved him wrong. A blade plunged into Lucius' side, and Lucius twisted away from the fiery, unexpected and exquisite pain.He shook his eyes clear of blood and felt the Raven Guard behind him -- he spun and thrust low with his sword, but once again his blades cut air and not flesh. Another lancing blow plunged into his back, and this time the pain was an unwelcome sensation. Lucius could see the Raven Guard, but he moved like nothing he had ever seen before, faster than any mortal man could possibly move, like a wraith or a being out of step with time. A black blade licked out and laid his cheek bare to the bone, a matching wound to the one Sharrowkyn had given him the last time their blades had crossed. Lucius spun, feeling suddenly helpless as the Raven Guard slipped around him with dizzying speed, his blades stabbing again and again. Lucius felt his sword tumble from his hand.Then the Raven Guard was at Lucius' back, pushing him to his knees, blades pressed down through his gorget into the hollows on either side of his neck. He informed the doomed Emperor's Children swordsman that it gave him no pleasure to kill him. Lucius attempted to speak, to say something to mark his death. But Sharrowkyn's blades stabbed down behind Lucius's collarbone, tearing through both his hearts and lungs, severing arteries and wreaking catastrophic damage that not even a Space Marine's transhuman physiology could undo. And all thoughts of a worthy valediction died with him. However, somehow the Chief Apothecary Fabius managed to recover Lucius's battered body and revived him through some unknown and arcane process, returning the arrogant swordsman to life.