Salamanders - Vulkan's Imprisonment: Vulkan had survived the nuclear fire of the Iron Warriors' orbital strike, where so many of his gene-sons did not. Finding himself surrounded by hundreds of Traitor Legionaries from both the Night Lords and the Iron Warriors, Vulkan resigned himself to his fate. Fighting valiantly, the primarch fought to the death, but was eventually overwhelmed by the sheer numbers of the enemy and was shot, stabbed and bludgeoned into unconsciousness.The Night Lords' primarch, Konrad Curze, always mentally unstable and now on the brink of outright insanity, saw the opportunity to torment his fallen brother and took the unconscious Vulkan as his prisoner. When the Salamanders' primarch finally awoke, he found himself fettered in massive chains aboard a gaol-hulk belonging to the VIIIth Legion. Over the span of several solar months, the Night Haunter took sadistic pleasure in attempting to break both Vulkan's body and mind, or kill him outright. But the task proved impossible, as every time Konrad Curze thought he had succeeded in killing his brother, Vulkan's body would miraculously regenerate to its former healthy state.Vulkan had been revealed to be a "Perpetual", a being who was capable of continuous cellular regeneration and therefore was effectively immortal, much like their gene-father, the Emperor of Mankind. Enraged, Curze took it upon himself to kill Vulkan as many times as was necessary to permanently rid himself of his intolerable presence.The Night Haunter personally beheaded the Salamanders' primarch, ripped out his throat with a piece of cutlery, stabbed him through the chest and virtually tore him limb from limb with his own wicked claws. When these attempts failed to kill Vulkan, Curze had him eviscerated, shot at close-range by hundreds of bolters, put into a ventilation shaft of a starship's engine and even stripped naked and thrown out of an airlock into the airless void of space. But the Night Haunter's efforts proved all for naught.Each time the Night Haunter thought he had successfully murdered his brother primarch, Vulkan's body would continue to regenerate back to its former vigorous state, further enraging the Night Lords' primarch. With Vulkan's unnatural abilities to regenerate revealed to him as well for the first time, Curze attempted to make Vulkan admit that he was no less a monster than himself.To further torment his brother, the Night Haunter had Davinite sorcerer-priests use the fell powers gifted to them by the Ruinous Powers to ensnare Vulkan's mind and run him through a series of illusionary mental trials where he continuously failed at some noble task, resulting in the deaths of innocents. But even this form of sorcerous torture failed to break the resolute Vulkan. Fed up with his insufferable prisoner, the Night Haunter devised a final solution to his problem of ridding himself of the Salamander's presence. Vulkan's fate would be decided in a duel to the death.He offered his brother a means of escape and achieving that which he had sought for so long -- his freedom. All he had to do was navigate a labyrinth, where, at the centre of it, lay his personal warhammer Dawnbringer. But this was no ordinary maze. At the request of Curze, the Iron Warriors' Primarch Perturabo had crafted him the singular prison, unlike any other, in imitation of his own private sanctorum known as the Cavea Ferrum. This special prison was an elaborate labyrinth, whose featureless walls and strange geometric design made it all but impossible to map and therefore escape. Anyone who attempted to mentally map the labyrinth would be hopelessly knotted in turns that should have been physically impossible. Even after trying scores of times to map the labyrinth, an individual would only manage more than a handful of turns within its twisting corridors before it all stopped making sense.But despite the odds, Vulkan did the impossible, and managed to find his way to the centre of the maze and reclaim his warhammer. With his weapon in hand, he overpowered his gaoler Curze, and activated the secret personal teleporter built into the head of the finely wrought warhammer. Vulkan immediately transported halfway across the galaxy, and reappeared in the upper atmosphere of the Ultramarines Legion's homeworld of Macragge. As he fell from an impossible height, his body was burned to a crisp upon reentry.But before his mind faded into blackness, Vulkan was content that he would soon find himself whole once again, and in the care of his Ultramarian cousins.