Nemiel heard the whine of servos as the tank's turret rotated to bear on its new target. Then came a shriek of superheated air, and a melta blast struck the tank from its right. The detonation reverberated down the street, but when the smoke cleared, Nemiel saw that Marthes had shot from too far away, and the melta blast hadn't fully penetrated the tank's armour. The crew inside had likely been stunned by the hit, but that wouldn't last for more than a few seconds.

Askelon grabbed the charge from Nemiel's fingers. 'I'd find some cover, if I were you,' he said, setting its timer and placing it in the pile.

The three Astartes hurried away from the pod and crouched at the base of the debris pile. No sooner had they settled onto one knee than the four charges detonated in carefully-orchestrated succession.

The blasts went off so close together that the sound merged into a single, thunderous explosion. Molten stone and vaporised earth sheeted out from the pile, channelled away from the pod by the precise placement of the charges. In one stroke, Askelon removed ten cubic metres of rubble from beneath one end of the drop pod. Slowly, then with gathering speed, the elevated end of the pod began to settle, until it landed upright with a hollow metal clang. The flank of the pod slammed into the corner of the building, sending an alarming series of cracks forking across the damaged walls.

Immediately, Nemiel heard the metal thud of harness releases popping then the buzzing whine of servos as the pod's four large ramps finally deployed, revealing Echo Four's lone passenger.

The huge figure in the centre of the pod was approximately humanoid in shape, with two stubby, powerful legs and a pair of mighty weapon arms attached to a giant, barrel-like torso. A sensor turret, shaped similarly to a helmet-clad head, swivelled left and right from an armoured collar set a little above the torso's middle. The overall effect was of a hulking, hunchbacked giant, with a matte black ceramite hide. Both shoulders bore the winged sword emblem of the First Legion, and a score of noble battle honours fluttered from the Dreadnought's frontal plates. A Mechanicum artisan had applied gilt scrollwork to the glacis, just beneath the Dreadnought's notional head, which bore the name Titus.

Gears and servo-motors whirring, Brother Titus strode from his drop pod just as the tank fired its cannon once more. The shell flew into the pod where Titus had been standing a moment before and blew it apart.

Red-hot shrapnel pinged like raindrops off Brother Titus's shoulders. The Dreadnought cleared the ramp in three long steps and kicked its way through the debris piles towards the rebel tank. Its turret slewed to the right, desperately tracking the oncoming war machine while the crew struggled to load another round into the cannon's breech.

Brother Titus was armed with a standard Dreadnought weapons configuration. His right arm terminated in a large, multi-barrel assault cannon, capable of firing streams of high-velocity shells that were lethal to troops and light vehicles, but far less likely to penetrate the thick armour of a battle tank. Titus's left arm, however, ended in a powerful, four-fingered hand that crackled with pent-up energies like an Astartes power fist. Nemiel and his brothers watched Titus charge through the ragged gap blown in the front of the building and bring that tremendous fist down on the top of the tank's square turret. Armour plates crumpled like tin; there was a bright, violet spark and a tremendous concussion as the turret split apart beneath the blow. Flames leapt from the ruptured seams.

Nemiel shook his head in awe at the Dreadnought's power. 'Brother-Sergeant Kohl, re-form the squad,' he said, and began limping quickly from the building. The pain in his leg had subsided to a dull ache, thanks to injections from his suit's array of pain blockers and his own enhanced healing abilities. He switched to the company command net. 'Force Commander Lamnos, this is Alpha Six,' he said. 'We've reached Echo Four and freed Brother Titus. No enemy forces in our immediate area. What are your orders?'

'Good work Alpha Six,' Lamnos responded. 'Titus was the only one still unaccounted for. The rest of the landing force has engaged rebel units along the tramway, and we've received word that forward elements of the Tanagran Dragoons are working south to link up with us.' There was a short pause while Lamnos consulted with his other squad leaders. 'There are still enemy units present around the entrance to the forge complex, approximately one kilometre to your southeast. Take Titus and engage the rebels.'

'Affirmative,' Nemiel replied. 'Alpha Six, out.' The Redemptor limped over to Kohl and Askelon, who were standing in the shadow of Brother Titus. Askelon was clearly in awe of the mighty Dreadnought; Kohl was looking up at Titus's sensor turret, his head cocked as though in conversation. They were probably speaking on a private channel, he realised. Dreadnoughts were an uncommon sight in the Legions; since they required a human mind to operate, only severely-injured Astartes were offered the opportunity to continue serving the Emperor by having themselves installed into one of the war machines. Those offered the task were typically warriors who had demonstrated great heroism in battle and were mentally strong enough to endure their entombment in a Dreadnought's sarcophagus. As a result, they were accorded tremendous respect by their brethren.

Titus's head swivelled slightly at Nemiel's approach. 'My thanks to you and your squad, Brother-Redemptor,' he said over the squad channel. Titus's voice was deep and powerful, and entirely synthetic, devoid of human inflection. 'Force Commander Lamnos has directed me to accompany your squad for the time being. What is our objective?'

'The rebels have taken the southern entrance to the forge complex,' Nemiel said, turning and heading off to the southeast. 'We're going to take it back.'

EIGHT

Dark Designs

A roiling, grey overcast hung over the towers of Sigma Five-One-Seven, swallowing the rays of the setting sun and plunging much of the processing plant into shadow as Zahariel and his warriors reached the outskirts of the site.

They made their approach straight down the plant's primary access road with a clatter of steel treads and a billowing wake of oily black smoke from the Land Raider's massive petrochem engine. Sitting in the assault tank's troop compartment, Zahariel adjusted the settings of the tactical display on the bulkhead next to his station and switched from light-enhancement to thermal view. Instantly the blocky outlines of the plant's main buildings and its sifting towers were painted in stark silhouettes against a vivid green background, their flanks studded by bright spots of white that marked the locations of hot chem-lights. Peering carefully at the display, he could make out a faint, white nimbus colouring the air at the centre of the plant; from what he knew of the site's layout, he suspected that was likely the heat rising from the power plants of the relief force's ten Condor transports. According to the blueprints, the site had a large, central landing zone for offloading heavy-lift cargo haulers. The reinforcements could touch down there and unload under cover without worrying about fire from rebel forces around the site perimeter.

Except that there weren't any rebel troops, as near as Zahariel could reckon. The dark foothills, scoured down to bare rock by Imperial crawlers, were silent and still. Stranger still was the lack of any obvious signs of attack: there were no gaps in the plant's tall perimeter fence, nor thermal scars on the buildings from small arms or light artillery fire. More and more, he was coming to believe that the threat to the plant had been internal rather than external. He'd accessed the site's status reports and work logs on the short flight from Aldurukh and discovered that the engineering team working on Sigma Five-One-Seven's thermal plant consisted of twenty-five Terran engineering specialists and a hundred Calibanite labourers. Could the labour pool have been infiltrated by insurgents? Zahariel thought it entirely possible. From there, it would have been easy to smuggle weapons onto the site and hide them in the plant's sub-levels until the time was right. Using the advantage of surprise, such a force could then easily overcome the rest of the engineers and the unsuspecting garrison, and then set an effective ambush for Imperial relief forces.