Mechanicum

'Arsia Mons,' said Rho-mu 31. 'A dead volcano brought back to life to serve the Mechanicum.'

'It's incredible,' breathed Dalia, looking over to the far side of the caldera, where a huge, industrial city-structure fashioned from what looked like blackened steel and stone rose from the lava like the broadside of a submerged starship. Enormous gates steamed in the lava, and mighty pistons of gleaming ceramite hissed and groaned as they rose and fell. Billowing clouds of superheated steam roared and vaporised like the breath of a host of great dragons, and Dalia saw that they were gaining height to fly over the bizarre structure.

Closer now, she could truly appreciate its enormous size and complexity, a precise series of sluices, overflow channels and pressure gates to keep the lava in motion and circulating through the system that fed the incredible sight on the far side of the volcano.

Guided down the flanks of the mountain in enormous chasms a hundred metres wide, the lava from the volcano fed a vast artificially constructed lagoon, an inland sea of glowing, hissing, bubbling molten rock.

Built upon this sea was the Magma City, and what a city it was…

Dalia's breath was snatched from her throat as she saw the mighty forge, surely the domain of Rho-mu 31's master, Adept Koriel Zeth.

All across the bubbling, flame-wracked surface of the lava, blackened cylinder towers soared from the magma beside giant structures in the shapes of flat-topped pyramids that belched fire and steam. Twisting roadways, boulevards, open squares, wide platforms and entire industrial complexes sat upon the raging heat of the lava in defiance of the awesome caged power of the planet's molten fire.

A golden route traced a path towards a mighty structure of silver in the centre of the colossal metropolis, but it was quickly lost to sight as the craft descended. Thick retaining walls of dark stone surrounded the lagoon, such that it resembled a lava-filled crater, and a colossal plain of sub-hives, hab-zones, landing fields, runways, control towers and a vast container port filled the horizon behind it, abutting the cliff-like walls of the volcano.

Continents of steel-sided containers sprawled outwards from the Magma City, towering skyscrapers of materiel: weapons, ammunition and supplies manufactured in the factories of Mars for the Warmaster's armies of conquest.

Fleets of enormous vessels filled the skies over the port, rising and descending to the surface of Mars in a veritable procession of steel and retro-fire. Each one was destined for worlds far distant from the Solar system and as valuable to the Great Crusade as any warrior or battleship.

A forest of lifter-cranes swung and groaned over the container port, their heavy, counterbalanced arms moving with leisurely speed in an intricate ballet as an army of servitors, loaders and container skiffs packed the holds of the enormous bulk conveyors with as much as could physically be contained.

Dalia held onto the stanchion as the ship banked, heading towards a landing platform within the city, a glowing cross of light sitting on a boom of metal that jutted out into the lava. The view through the photomalleable steel rippled in the heat, and Dalia found herself becoming nauseous with the disorientation.

Rho-mu 31 placed his stave against the wall, and once more the side of the vessel became opaque. The hull began to vibrate and screech as they descended through the blistering thermals.

'Do they ever have crashes here?' asked Dalia, knowing that such accidents could have no survivors. 'I mean, have any ships gone into the lava?'

'Sometimes,' said Rho-mu 31. 'It is best not to think of it.'

'Too late,' muttered Dalia, as the noises of the ship's engines changed in pitch from a low rumble to a high-pitched shriek, attitude thrusters firing to correct the rip tide air currents. The pilot was clearly having difficulty in lowering their ship to the landing platform, and Dalia closed her eyes, trying not to think of what would happen if they went into the lava.

She tried not to picture the lava searing the meat from her bones, the fumes choking her and the agonising pain of watching her body disintegrate in front of her. Of course she would not live long enough to experience these things, but her mind delighted in tormenting her with these dreadful visions of catastrophe.

Dalia took a deep breath and forced the images from her mind, fighting to keep them from overwhelming her. She felt a thump on the underside of the craft and her eyes flashed open.

'What was that? Has something gone wrong?'

Rho-mu 31 looked at her strangely, and though the bronze mask concealed his features, Dalia could sense his amusement at her panic.

'No,' he said. 'We have simply landed.'