The three were smaller now, having shed many of their modules. Still advancing, they abruptly flew apart, melding into one cloud of snakish forms. In this, two spirals appeared, drawing in those surrounding forms, re-coagulating into two complete living vessels, which joined hundreds more of these things now closing on the Battle Wagon. Already explosions dotted the hull of that huge vessel, space around it also filling with debris shed by its attackers as it brought its weapons to bear on them.

‘Head for your landing craft,’ Brutus instructed over general com.

The Brutal Blade boomed and lurched, sending some of those onboard stumbling, and distantly Azroc could hear metallic objects falling. It must have been one hell of an impact to even briefly overcome the inertia of so massive a vessel. Gravity now shifted underneath his feet, bumping him up off the floor then back down again. All around him the Sparkind grabbed up their equipment and headed down towards the shuttle bay.

‘We’re gonna lose grav soon,’ said Karischev, hitching the strap of a proton carbine over his shoulder and grabbing up a bulky pack.

Azroc nodded and gestured for him to proceed.

‘Nice knowing you, Azroc’ Karischev stabbed out a hand.

Feeling oddly touched, Azroc shook it, then returned his attention to the displays. His position aboard this ship being only vaguely defined as observer/advisor, he did not need to follow any orders given to the others. In his opinion, if the Brutal Blade ended up in a fight it could not win, and ejected its various shuttles and landing craft, their occupants stood no more chance than if they had remained aboard. The situation would be different if they were near a planet on which they could land. Out here such tiny craft would be easy prey with nowhere to run.

On the screen, caught like a fish in a net, another of the old dreadnoughts became enwrapped in and concealed under a layer of bacilliforms. He observed the rod-ships melting into its surface but leaving it encaged in a sparse woody over-structure. This same vessel hung in space for a while as if contemplating its situation, then began firing on nearby Polity comrades. Azroc realized Brutal Blade itself had begun an attack run on this ship, and now he could feel the stuttering vibration of its linear accelerators under his feet. Their first action in this battle: to fire on one of their own vessels. An imploder missile struck the older vessel, gutting it, then an instant later blasting away its remaining shell.

Only a few Sparkind remained in the dormitory when the grav-plates shut down. Azroc grabbed a nearby stanchion, and braced himself. Now sudden changes in acceleration threatened to throw him off his feet. For a moment it felt as if the ship was dropping from a cliff edge, then it zigged and zagged, flinging him from side to side. He gripped the upright bar with both hands and applied his full Golem strength to lock himself in position. On the screens: wreckage, burning ships, clouds of metal vapour glittering like Christmas decorations.

Karischev was right about the duration of this battle; it would not be long at all.

Further detonations jerked him from side to side, then something struck really close by. The stanchion tore from the wall as a massive impact from below slammed him to the floor. A series of whooshing thumps came from his left, as air pressure blew the windows overlooking the shuttle bay from their frames. He could hear alarms screaming and a sudden gale began blowing past him, which meant terror for anyone aboard a ship who needed to breathe. Two Sparkind were sucked out into the shuttle bay, another nearby was hanging onto a bunk rail while his envirosuit automatically closed up. Beyond the windows the bay itself stood open to vacuum—the outer doors and part of the hull ripped away. Landers detached from the bay floor and blasted out into that night. One struck the edge of the hole now in the ship’s side and tumbled from sight. Bright detonation beyond, so bright that metal steamed and other materials burned or melted wherever the light shone. Dropping, manoeuvring—the screens were out, but plenty of information was still available through tac-com channels, if intermittently broken. Azroc quickly shut down all his human emulation and began accessing information in a way only possible to deeply gridlinked humans. Now he did not need the screens to see how badly they were faring.

The mycelium carried out its task with admirable efficiency, though in the process it emptied all the Heliotrope’s energy reserves and was now placing a huge drain on the reactor. As a consequence, the power to the larger drill she was putting through the crust kept being cut. The hole diameter needed to be larger so that she could force down through it the five slow-burn CTDs presently waiting ready at the top of the shaft. Without them, the temperature would be a problem for her purpose. A third of the chlorine collected by the mycelium and released by it into currents in the methane sea, had dispersed in particulate form, and two thirds of it had coagulated in a layer under the crust directly below her. This low-temperature mix would not be sufficient for her needs. However, detonating four of the bombs at a depth of two hundred yards below the crust would create a huge bubble consisting of a mix of gaseous chlorine and methane. She estimated the pressure increase produced would lift the crust at least a hundred feet, and cause it to start breaking apart. No problem there, though, for before it got a chance to blow the gas mix out into space, the time-delay switch on the fifth CTD would then operate. The extra heat this would provide was incidental, the intense flash of light it produced being more important.

Orlandine sat back and remembered being eight years old and observing a demonstration in a basic chemistry class. The whole lesson had been conducted in a virtuality, but that did not change the fundamental facts. She and her classmates had sat in a representation of a pre-millennial classroom, while the AI in charge apparated as an old gentleman in Victorian garb. Inside a cabinet, whose front door was armour-glass, rested a conventional glass vessel filled with misty gas. Behind this, screwed into the back of the cabinet, was an ancient filament light bulb. The bulb came on with a dull red glow.

‘As you can see,’ the teacher pointed out, ‘no reaction. Red light does not contain sufficient energy to split chlorine molecules. But now, observe.’

While she watched, the chemical formulae had played in her mind, through her early haiman implants, and she understood those formulae just as she understood mathematics, on an almost instinctive level. The light bulb grew brighter, changing to a blue-white glare. Instantly the glass vessel exploded.

‘The photochlorination of methane,’ the teacher explained. ‘The light needs a wavelength of no more than 494nm to split the chlorine molecules into radicals, which can then combine with the methane to form methane radicals and hydrochloric acid. This is an example of a strong, exothermic chain reaction. Now let us look at this in detail…’

The classroom faded and, from a vantage in albescent space, the pupils observed a nanoscope view of the actual molecules and their reaction. As Orlandine recollected, the lesson then moved on to the quantum processes involved—basic chemistry for haiman children had been rather more advanced than for others.

Photochlorination.

She needed to destroy the USER located here, and that early chemistry lesson provided an elegant solution. If everything went to plan she could fire the CTDs down to their designated positions within the hour. Orlandine smiled to herself and, still linked via her carapace to the operation she was conducting, she availed herself of hot coffee from the spigot provided within Heliotrope’s interface sphere. It seemed almost inevitable that, at that very moment of relaxation, the ship’s detectors should pick up movement from the nearby surface installation.