Cailin said nothing, but she continued on and the others went with her.
It happened again later, as they hunted through another empty series of rooms. This time it was a bigger group of Sisters and Tkiurathi, and there was a clearer picture. Aberrants, swamping into the corridor, bolstered by Weavers. They were systematically assaulting the Sisters, group by group, taking advantage of the fact that they had to split up to search the complex. This was what they had lured them down here for. They knew their best chance for survival lay in picking the Sisters apart.
But that was not a usual Weaver tactic, Kaiku thought. If they had the strength of numbers, they would have attacked outright. They were delaying until their reinforcements could arrive. They were on the defensive.
As Cailin had hoped, they had been drawn off by Reki's men, and had not left enough of their forces behind to protect themselves from something like this.
As it turned out, the second group of Sisters were not taken down so easily. The Tkiurathi put up a vicious fight, and it was still ongoing by the time Cailin and Kaiku were ambushed.
The Aberrants boiled out of a side-corridor, filling the junction with their bodies and ploughing towards the Tkiurathi, howling. They almost caught the front line by surprise: they had been virtually soundless in their approach, and the Weavers had cloaked themselves from the Sisters well enough that, in this difficult environment, not even Cailin had detected them. But the soft warbling of the shrillings had given them away at the last moment. The Tkiurathi met the charge with their gutting-hooks sweeping.
The two groups crashed together. The corridors were wide enough for seven or eight to fight at a time, but the Aberrants in their frenzy clambered over the top of the combatants to reach those behind. Most found themselves eviscerated as they did so, their exposed underbellies ripped open and their steaming innards spilling out. The front line of the Tkiurathi collapsed under the weight of the creatures and were either dragged free or savaged. But the Okhambans were taking down the Aberrants faster than they themselves were dying. Their twin-bladed weapons, one in each hand, hacked and plunged and parried. The warriors, men and women both, were possessed of an uncanny harmony of movement that kept their blows from interfering with their neighbour's even when they were packed tight like this.
The Weavers had made one bad mistake. The Tkiurathi were born for close combat. Their weapons were adapted to its purpose and their fighting technique tailored to those conditions. Life in the jungle had meant that they had evolved short, fast, controlled movements so that they would not tangle their blades in vines or trees, and they had reactions honed by generations of living in one of the most hostile places in the Near World. Here in the confines of the tunnels they outclassed the Aberrants, who were used to the open spaces of the mountains.
The Tkiurathi were as animals themselves when they fought, primal and ferocious, and they dodged and slashed and killed until they were drenched in the blood of their enemies.
Kaiku and the Sisters dealt with the Weavers. There were only four of them, and the Sisters in Kaiku's group outnumbered them two to one. It was no contest. The Sisters attacked in a whirling chaos of threads and the Weavers' defences could not stand it. They held out briefly and then collapsed. The Sisters ripped into the fibres of their enemy's bodies, and the force released by the sundering turned the Weavers to pillars of fire.
With the Weavers gone, they broke the necks of the three Nexuses who were controlling the Aberrants, and the predators collapsed in disarray, some of them fleeing or attacking each other. The Tkiurathi made short work of the rest.
Kaiku caught sight of Tsata nearby. He was breathing hard, flecked in blood, his eyes sharp with an intensity that she only saw when he fought. A quiet and introspective man in the main, his flipside was this feral killer. She wondered briefly what that meant for the future, how deeply that ferocity was suppressed and whether it might one day be turned on her, if she should stay with him. Was he capable of that? How could she tell? How well, in the end, did she know him?
Tsata sensed her gaze upon him and turned to meet it. She felt a shock of guilt, as if he had realised what she was thinking. Then, expressionless, he turned away, and the group began to move on, deeper into the maze of corridors.
The Weavers attacked them three more times over the next hour. Other groups of Sisters who were searching elsewhere in the complex were similarly assaulted by forces of varying size. Some were overwhelmed and slain; some managed to kill their attackers. Cailin's group, with eight Sisters among them, had the strength to outmatch the Weavers; but some were not so lucky.
Kaiku could sense Cailin's mood growing graver. The Weavers' plan, costly though it was, was working. The invaders' numbers were dwindling slowly, and still there had been no sign of a way down to the witchstone beneath them. They could be running around these colossal sub-levels for hours yet, being gradually whittled away; but long before that, the Weavers' reinforcements would arrive, and flood down through the mine. Nobody thought of giving up and going back to the surface. They were just too close. But the enemy army could not be far from Adderach now.
Reports of other places like the chamber that Kaiku had destroyed came through to them. One group found a huge complex of grim workshops, forges and lathes and whittling benches where the Masks of the Weavers were crafted; but there were no Edgefathers to be seen, for they had all been taken elsewhere, presumably to the same place that the absent golneri had gone. There was also a bigger forge nearby, something entirely different to that of a blacksmith or an artisan: a monstrous, sweltering place with huge vats of molten metal and great moulds, where they found newly-made pipes and cogs and other components of the Weavers' devices. Another found a room full of roaring machines that pumped up and down, and in its centre a pool of bubbling mud that belched foul-smelling gas. Unusually, there was a marked lack of evidence of the Weavers' insanity in these sub-levels: there were no corpse-pits, no wild scrawls or strange sculptures. Here there was only the chill efficiency of machinery, designed by the Weavers and built by the golneri. Aricarat kept a tighter rein on his subjects down here.
Whether by Shintu's will or Cailin's guidance, it was Kaiku's group who found the way down. And they found it held against them.
They were directly above the witchstone at this point: Kaiku could feel it through the great weight of rock beneath their feet. They had reached what appeared to be a wall of metal at the end of the corridor, but which turned out on closer inspection to be a door of some kind. Cailin rested her hand against it and closed her eyes; a moment later there was a loud crunch, and Cailin stepped back as the wall began to part in the centre, sliding into recesses on either side.
The chamber it revealed was dimly lit by a scattering of gas-torches, but it was too large for them to do anything more than offer faint contrast to the shadows which cloaked the far end. It was circular, like the incubation room they had passed through, and its walls were metal and lined with cables and heavy pipes that leaked steam at regular intervals with a soft sigh, as if the mines themselves were breathing. In the centre of the room was a tower of machinery, bristling with cogs and chains. In the tower was a featureless metal doorway.
They stepped into the chamber, spreading out around the entrance, and regarded the strange edifice before them.
'There it is,' said Cailin. 'That is how we get to the witchstone.'
Tsata took a step forward, but Kaiku held out her hand to block him.
'It is too easy,' she said.
Something massive shifted in the shadows at the back of the chamber, moving from behind the obscuring bulk of the tower. There were smaller figures, also, strangely indistinct even to Kaiku's kana-adapted eyes.