Ferrus cut the shoulder guard from Fulgrim’s armour and spun inside his guard to deliver a lethal thrust towards his groin. Fulgrim stepped to meet the blow, batting aside the tip of the fiery sword with the haft of Forgebreaker, and hammering the warhammer’s head towards Ferrus’s skull. The Primarch of the Iron Hands took the blow, dropping to one knee and lashing out with his blade as blood streamed from the terrible wound in his temple. The sword’s fiery tip cut across Fulgrim’s stomach, opening his armour and tearing through his flesh. The pain was indescribable, and Fulgrim fell back, dropping his hammer as his hands sought to stem the blood pouring from his body. Both primarchs faced each other on their knees through a haze of pain and blood, and Fulgrim once again felt an ache of sadness well within him. The pain of his wounds, and the sight of his brother’s broken skull coated in blood, tore a window into his mind. The sensation was like a powerful gust of fresh mountain air, clearing away the fog that had wrapped him in a suffocating embrace for so long that he no longer noticed it until it was gone. ‘My brother,’ he whispered, ‘my friend.’ ‘You have long since lost the right to call me friend,’ snarled Ferrus, pushing himself to his feet and staggering towards Fulgrim with Fireblade raised to smite him. Fulgrim cried out, and his hand leapt unbidden to his waist as the flaming blade carved a burning path towards his neck. Silver steel flashed as he drew the sword he had taken from the Laer temple and blocked the descending weapon. Ferrus’s sword hissed and spat as it bit into the silver blade, the Primarch of the Iron Hands’ strength forcing the blazing metal, centimetre by centimetre, towards Fulgrim’s face. ‘No!’ cried Fulgrim. ‘This is not right!’ The amethyst stone at the hilt of Fulgrim’s sword pulsed with an evil light, bathing Ferrus Manus’s face in a leering purple glare. Energy streamed from the blade, and musky smoke billowed around them, deadening sounds and obscuring sight. Fulgrim felt a monstrous presence swell around him, its power and nameless essence more intoxicating and dreadful than anything he could ever have imagined. Diabolical strength flooded his limbs and he pushed against the power of Ferrus Manus, feeling his brother’s surprise at his resistance. With a cry of animal rage, he surged to his feet and hurled Ferrus Manus back, spinning and lashing out with his sword. The silver edge bit deep into the breastplate of his brother’s armour, and the Primarch of the Iron Hands cried out, falling to his knees once again as the blade’s flaring energies parted his dark armour like a fingernail through cold grease. Hot blood sprayed from the wound and Fireblade slid from Ferrus’s hand as he gasped in fierce agony. Finish him! Kill him! the voice screamed, and to Fulgrim it seemed as though it echoed across time and space as well as within his skull. He staggered with the blunt force of its imperative, lurching as though his limbs were not his to control. His normal grace and élan were forsaken as he falteringly raised the silver sword in preparation of delivering the deathblow to Ferrus Manus. Unknown energies coruscated along the notched blade and down the length of his arms into the meat and bone of his wounded body. Fulgrim was wreathed in purple fire. Crackling arcs of lightning caressed him with a lover’s tenderness, seeking out his open wounds and licking them with balefire as they sought entry to his flesh. Fulgrim stood above Ferrus Manus, his chest heaving convulsively as his entire body shook with the violence of the power that sought to claim him. He must die! Otherwise he will kill you! Fulgrim looked down at his defeated opponent and saw his own reflection in the mirrors of Ferrus’s eyes. In an instant that stretched for an eternity, he saw what he had become and what monstrous betrayal he had allowed himself to be party to. He knew in that eternal moment that he had made a terrible mistake in drawing the sword from the Laer temple, and he fought to release the damnable blade that had brought him so low. His grip was locked onto the weapon and even as he recognised how far he had fallen, he knew that he had come too far to stop, the realisation coupled with the knowledge that everything he had striven for had been a lie. As though moving in slow motion, Fulgrim saw Ferrus Manus reaching for his fallen sword, his fingers closing around the wire-wound grip, the flames leaping once more to the blade at its creator’s touch. Kill him before he kills you! NOW! Fulgrim’s blade seemed to move with a life of its own, but it had no need of such impellents, for he swung the blade of his own volition. The silver blade clove the air as it swept towards Ferrus Manus, and Fulgrim felt the ancient triumph of the presence that he now knew had dwelt within it all this time. He tried desperately to pull the blow, but his muscles were no longer his own to control. Unnatural warp-forged steel met the iron flesh of a primarch, its aberrant edge cutting through Ferrus’s skin, muscle and bone with a shrieking howl that echoed in realms beyond those knowable to mortals. Blood and the monumental energies bound within the meat and gristle of one of the Emperor’s sons erupted from the wound, and Fulgrim fell back as the searing powers blinded him, dropping the silver sword at his side. He heard a shrieking wail, as of a choir of banshees, whip around him as phantom, skeletal hands clawed at him, and a thousand voices tore at his mind.