'You would do well to let us pass,' snarled Vaanes. . Onyx shook his head. 'No, my master has commanded me to bring you to him.'
'Your master?' said Uriel. 'Honsou?'
'Indeed,' said Onyx.
Uriel could see that there was no they were going to get past Onyx without violence. He had no idea how fearsome the enemy warrior Onyx was in blade-to-blade combat and had no desire to find out.
Calmly, he said, 'Kill him.'
Bolter fire ripped along the street, but Onyx moved like quicksilver, a darting shadow that slipped between the shells and pirouetted above the hail of gunfire. Bronze claws slashed for Uriel's belly and he threw himself back against the wall, only just avoiding being disembowelled by Onyx's stroke.
Pasanius stepped in and hammered his boot towards Onyx, but the black warrior spun away and cracked his elbow into Pasanius's face before leaping over him and delivering a spinning kick to Ardaric Vaanes. Kyama Shae fired his bolter at point blank range, the shells ricocheting from the gleaming black armour of his target.
Onyx lunged close and hammered his fist into Shae's gut, the bronze claws tearing through the Crimson Fist's armour and ripping upwards. Onyx spun away from his victim with a tortured crack of bone, Shae's spinal column clenched in his fist. The Space Marine collapsed to his knees, blood flooding from the great wound torn in his body. His eyes stared in horrid fascination at his spinal column in another's hands for the briefest second before he pitched face first to the ground.
Uriel's jaw dropped open in horror at the sight, as the dripping, bloody spinal column was enveloped within the glassy darkness of Onyx's armour, and the silver-eyed killer leapt upwards as more bolter fire raked the wall behind him. He pushed off from the wall, twisting in midair to lash out with his claws and feet, crushing windpipes and decapitating Space Marines with every blow.
As he landed, he plunged his bloodstained blades into each victim, ripping their spines out with the awful sound of splintering bone. Five Space Marines were down and they hadn't managed to shed a drop of this thing's blood. Uriel sprayed bolts towards Onyx, but no matter how he anticipated the killer's movements, he was always just that little bit too slow to hit him.
'Emperor save us, he's too fast!' shouted Vaanes.
Another Space Marine fell, ripped open from groin to sternum and Uriel could see that Onyx was not going to be too particular in how he carried out his master's wishes. The black-armoured warrior spun through the air, his blazing silver veins and eyes leaving molten trails as he moved with preternatural speed.
Uriel raised his bolter as Onyx leapt for him, but knew that he wouldn't be quick enough. Onyx's fist hammered into his throat, the claws on the furthest extremities of his fists pinning him to the wall behind. Uriel's head cracked painfully against the brickwork and he felt blood matt his hair. He saw that Onyx's middle claw was partially retracted into his flesh, the point pricking the skin of Uriel's throat.
'Anyone else moves and your leader dies!' shouted Onyx, bathing Uriel in silver light as he spoke. The flames from the burning Exuviae had died and the renewed oily, shadow beasts slithered forward, rearing up on amorphous bodies that now achieved a semblance of solidity. The survivors of the warrior band surrounded Onyx and Uriel, their weapons aimed squarely at the symbiote's back.
'I thought you said your master wanted you to bring us to him,' gasped Uriel.
'He did,' nodded Onyx. 'But he didn't say if you were to be alive.'
'He's not our leader,' said Vaanes. 'So go ahead and kill him, but you will follow him into death!'
'I beg to differ,' said Onyx. 'I can see his soul burning with the light of purpose.'
'Vaanes, shoot him!' shouted Uriel, twisting in Onyx's grip and closing his eyes as bolter shells filled the air around him with a deafening roar. He felt Onyx shudder as the bolts struck him. Amid the gunfire, he heard the warrior laugh, and cried out in pain as he felt Onyx's middle talon stab forwards to punch through his throat and embed itself the wall.
The talon was ripped free and he slid down the wall, blood pouring from his neck and armour in a scarlet wash before the Larraman cells were able to clot his blood and stem the wound. Uriel gasped, the breath rasping in his throat, and he realised his trachea had been completely severed. Uriel closed his eyes as his vision greyed and his body fought for oxygen, his chest hiking convulsively. He fought to stay focused, knowing that to slip into unconsciousness was to die, and shifted his breathing to the third lung grafted to his pulmonary system. His altered breathing pattern shut off the sphincter muscle that normally took in air and he gulped down a great breath as his enhanced physiology took over.
Onyx spun beyond the hail of shells, landing behind the Space Marines with an atavistic howl of bloodlust. His claws swelled to become monstrous golden swords and three Space Marines were hacked apart in as many blows. His face swelled and rippled, black horns curling from his temples and gleaming lines of augmetic body parts becoming visible within his form as the daemonic entity within Onyx took complete command of his body.
His eyes blazed and Uriel could see the beast he had become was eager to do them more harm, but before he could enact it, his entire body shuddered and the daemon-thing Onyx had become retreated back into his flesh, the golden swords writhing and sliding back into his hands.
Even as Uriel watched, Onyx's original form was restored before his eyes.
Onyx let out a long breath and dropped to one knee, but before any of the warrior band could take advantage of his momentary vulnerability, the undulating forms of the Exuviae roared like black tidal waves and bore down upon them. Uriel struggled to rise, but the bubbling, animated pollutants swept over him, pinning his arms and holding him fast within their grip.
Dull, mindless eyes ruptured from the toxin-flecked matter, blinking idiotically at him and he heard the repulsed cries of the surviving Space Marines as the Exuviae swallowed them in their stinking, foetid embrace.
With Onyx leading the way through the interior of Khalan-Ghol, the delirious architecture seemed to resolve itself in response to his very presence. Where the chaotic nature of its plan had led Uriel and his battle-brothers a merry dance through its shadow-haunted streets, it eased the path of the daemonic creature and his shambling, slithering following. The Exuviae roiled along the cobbled streets with a grotesque, rippling motion, bearing their immobile charges within their odious, fluid bodies.
Only Uriel, Pasanius, Vaanes, Seraphys, Leonid, Ellard and nine other Space Marines had survived to reach this far within the fortress, but Uriel knew that so long as he drew breath he could not forgo his death oath. The soot-stained thoroughfares of the fortress soon fell away to reveal their ultimate destination: the centre of the fortress and the great tower of iron.
Whether it had been a trick of perspective or the illusory power of Chaos, Uriel did not know, but he was shocked speechless by its sheer immensity. Its summit was lost to sight beyond the writhing purple clouds above and it was impossible to see the entirety of its width. Twisting, crooked towers sprouted from its sides, overhanging forges spewed thick toxins into the air, swooping winged things clustered around dark rookeries and evil lightning crackled from slitted windows. A high wall surrounded the base of the tower, its ramparts thick with Iron Warriors and gun turrets.
A huge gate of black iron with a tall, armoured barbican to either side defended the entrance to the tower and as Onyx led them towards it, the dread portal swung open with a scream of deathly anguish. The Exuviae carried them through the dark gate, and as they were borne along the passageway, Uriel saw scalding steam gusting from the spiked murder holes in the roof.