Loth was about to move away, determined to send the message that he, and not the Emperor’s Angels, was in charge at Mercy Rock, when Pyriel’s voice, resonant with psy-power, stopped him.

‘That won’t be necessary, commissar.’

Loth didn’t looked impressed at he stared at the Librarian. His expression demanded an explanation, which Pyriel was only too pleased to provide.

‘We know our orders and the tactical disposition of this battle. Weaken the shield, get us close enough to deploy an insertion team in the vicinity of the generatoria and we will do the rest.’

‘I– that is, I mean to say, very well. But do you not need–’

Pyriel cut him off.

‘I do have questions, though. That man, the trooper you executed: what did he mean by “spectres”, and what is Hell Night?’

Loth gave a dismissive snort.

‘Superstition and scaremongering – these men have been lacking discipline for too long.’ He was about to end it there when Pyriel’s body language suggested the commissar should go on. Reluctantly, he did. ‘Rumours, reports from the last night-attack against the secessionists, of men disappearing without trace under the earth and unnatural denizens prowling the battlefield. Hell Night is the longest nocturnal period in the Vaporan calendar – its longest night.’

‘Tonight?’

‘Yes.’ Loth’s face formed a scowl. ‘It’s sheer idiocy. Fearing the dark? Well, it’s just damaging to the morale of the men in this regiment.’

‘The former colonel, did he supply you with these… reports?’

Loth made a mirthless grin.

‘He did.’

‘And you had him shot for that?’

‘As my duty binds me, yes, I did.’ Loth had a pugilist’s face, slab-flat with a wide, crushed nose and a scar that ran from top lip to hairline that pulled up the corner of his mouth in a snarl. His small ears, poking out from either side of his commissar’s cap, were ragged. He was stolid when he spoke next. ‘There is nothing lurking in the darkness except the false nightmares that dwell in the minds of infants.’

‘I’ve seen nightmares made real before, commissar,’ Pyriel took on a warning tone.

‘Then we are fortunate to have angels watching over us.’ Loth adjusted his cap and straightened his leather frockcoat. ‘I’ll weaken the shield, be assured of that, nightmares or no.’

‘Then we’ll see you on the field, commissar,’ Pyriel told him, before showing his back and leaving Loth to wallow in impotent rage.

‘You really took exception to him, didn’t you brother?’ said Emek a few minutes later, too curious to realise his impropriety. They were back out in the muddy quagmire. In the distance, the sound of battle tanks moving into position ground on the air.

‘He had a callous disregard for human life,’ Pyriel replied. ‘And besides… his aura was bad.’ He allowed a rare smirk at the remark, before clamping on his battle-helm.

Overhead, the sky was wracked with jagged red lightning and the clouds billowed crimson. Far above, in the outer atmosphere of Vaporis, a warp storm was boiling. It threw a visceral cast over the rain-slicked darkness of the battlefield.