Had Idaeus been the first step towards the end of everything the Ultramarines held dear? Could he have been wrong in his teachings, and was Uriel on the path that lead to ultimate damnation? Already he had gone against the teachings laid down in the codex, most recently on Pavonis.
In the dim light of the Vae Victus, Uriel felt the stirrings of doubt for the first time in his life.
Aboard the bridge of the Sword class frigate Mariatus, Captain Payne watched the tyranid bio-ships closing on his vessel with a mixture of anticipation and dread. It stunned him that creatures so huge could be alive, though he assumed that, in the way of the larger beasts on his homeworld, they would be as stupid as they were massive.
A clutch of drifting objects floated before the bladed ships, pulsing ahead of the alien vessel as it continued closing the distance between them.
The captain folded his arms and nodded to where his gunnery officer stood by the weapons station.
'You have a firing solution?' he asked.
'Aye, sir, the lead enemy vessel will be in range in just under a minute.'
'Very good. Order all ships to begin firing as soon as the enemy ships are in range.'
Payne marched back towards his command chair, perched atop a raised dais at the centre of the bridge. He followed the progress of the other ships in his squadron, Von Becken and Heroic Endeavour, on the pict-slate before him, satisfied that they were holding proper station - allowing their leader to take the first shot. A shiver of premonition went down his spine as he watched the creatures before his ship turn ponderously to face him and he felt he could see their dead, expressionless eyes staring deep into his soul. Such a notion was plainly ridiculous: these beasts would have been blinded by spatial debris were they to rely on sight alone. But still the notion persisted and he bunched his fists to halt the sudden tremors that seized him.
'All guns firing now,' reported the gunnery officer calmly as the ship juddered with the recoil of its powerful guns. The vibrations running along the worn teak flooring did not do justice to the violence of his guns' firing. Right now, hundreds of massive projectiles and powerful lasblasts would be hurtling through space to unleash a torrent of explosive death amongst these vile aliens.
He watched a flurry of detonations explode around the nearest bio-ship, gradually drawing in as his gunners bracketed it. Some even managed to score direct hits, their shells blasting one of the creature's giant, bladed limbs from its body. Vast streams of fluid pumped from the bio-ship's innards as the remainder of his squadron opened fire and the flash of distant explosions momentarily obscured the tyranid ships. When the viewing bay cleared, he saw that one had been completely blown apart and another was drifting listlessly in space. He surged from his chair and punched the air in triumph.
'Damn me, but that was some fine shooting. My compliments to the gun deck.'
'Aye, sir,' replied the gunnery officer, proudly.
He watched the viewing bay, seeing the remaining enemy ships shuddering, as though gripped by some form of spasm.
'What in the Emperor's name is that?' he wondered aloud.
Before he realised what he was seeing, bolts of gelatinous liquid spurted from the front section of the bio-ships.
'All ships, hard to starboard!' he yelled, suddenly understanding what was happening.
The bridge of the Mariatus heeled sideway as emergency power was routed to the engines, but a ship of war does not react quickly, even if her captain does. With terrifying speed the bolts hurtled towards his ships, streaking through space in a tightly focussed stream. Payne gripped the armrests of his chair as his ship fought against her forward momentum to turn away from the incoming fire.
Even as the bolts slid to the side of the viewing bay, he saw that it would not be enough. The Mariatus would escape significant harm, but there was no way either of her sister ships could possibly evade in time.
Three corrosive acid bolts struck Heroic Endeavour on the lower section of her engine compartment. In panic, her Adeptus Mechanicus enginseers shut the engines down, venting her combustion chambers as they realised the acid was eating away at the plasma cells that powered the engines. Their quick thinking undoubtedly saved the ship and, to their immense relief, emergency procedures were able to halt the damage before the acids could breach the volatile fuel stores. Four hundred and thirty-seven men lost their lives in the attack, but her sister ship, Von Becken, was not so fortunate.
The full force of the tyranid weapons struck Von Becken broadside on, just behind her swept prow. The sheer force of impart smashed the bolts through the first layered sections of armoured panels, before the bio-acids ate through the remainder and the full force of the tyranid weapons engulfed the mid-level decks of the ship.
Hundreds died in the first moments of impact, smashed to pulp or sucked into space as explosive decompression blew out adjacent sections of the hull. The acids filled compartments with burning fluids that dissolved flesh and metal in a heartbeat, the fumes as lethal as any nerve agent devised by the Adeptus Mechanicus. Blast doors rumbled closed, sealing off the area of the impact, but the corrosive fluid liquefied the doors and spilled onwards, dissolving decks and pouring down onto the screaming men below.
The Von Becken's hull, already weakened by the acids and under stress from the violent manoeuvring screeched in protest, finally buckling as the venerable ship split in two.
Torpedoes launched from the Cobras of Hydra squadron streaked through space on blazing tail plumes, arcing for the nearest of the giant manta-like creatures. A cloud of spores drifted before the ship, and as the torpedoes closed the gap, a swarm of them surged forwards to intercept the missiles. Explosions rippled through the cloud of spores as the torpedoes smashed through them, some detonating prematurely, some broken apart by the acidic explosions of the spores.
Not all the torpedoes could be stopped and a handful slammed into the body of the mantis creature, the primary warheads vaporising a chunk of its hide, before the tail sections exploded, thrusting the powerful centre section of the weapons deep inside the creature to detonate.
The monster's belly heaved as the torpedoes exploded one after the other and it listed drunkenly as its lifeblood poured from its gaping wounds. But as grievously wounded as it was, the creature was by no means finished, and it could still fight back. A swelling of intercostal motion pulsed along the top of the creature and a flurry of jagged spines rippled from its flanks, thousands hurtling towards its attackers like enormous javelins. At such range, the odds of hitting a relatively fast moving target such as a destroyer were huge, but if you factored in the sheer number and density of the spine cloud the odds changed dramatically.
Two Cobras exploded as hundred metre spines hammered through their armour, smashing through the armaplas and ceramite hulls with horrifying ease. The lead vessel's bridge was destroyed upon first impact, penetrated from prow to stern by a dozen spines, while the second was reduced to a blazing hulk as three giant spines penetrated her engine core and started dozens of uncontrollable conflagrations.