Tunnels 02, Deeper

the twins taunting Will, then their threat to kill Topsoilers using Dominion.
    "Did you get that?" Drake whispered over to her.
    "Yes," she said, nodding grimly in the darkness.
    The shouted exchanges came to her as if she was at the bottom of a well, echoing and swirling and often too indistinct to grasp in their entirety. But despite her deteriorating condition, some part of her brain retained enough functionality to process the snippets.
    She heard her name mentioned and what the twins said about Tam's and Grandma Macaulay's deaths. Sarah's body locked up with fury. The Styx were wiping out all the members of her family, one by one. Then she heard the threats to kill Will and Cal and everyone with them.
    "You've got to help them!" she said to Drake.
    He looked helplessly at her. "What can I do? I'm hopelessly outnumbered and I've only got stove guns. There's a whole Styx army over there."
    "But you have to do something!" she exhorted him.
    "What do you suggest? I chuck rocks at them?" he said, his voice uneven with anguish.
    But Sarah had to at least try to go to her sons' aid. Unnoticed by Drake as he continued to watch events from behind the menhir, she began to haul herself over the ground. She was determined to get to where Will and Cal were, even if she had to stop often to rest.
    She heard the Rebecca twins counting, and the shouts of desperation down at the end of the slope.
    Squinting through the glare, she glimpsed a small figure as it stepped into the light. She knew with a mother's intuition that it was Cal. Her heart pounded feebly as she extended a hand to where he stood, so far away. She watched him frantically waving his arms and heard his hopeless cries.
    Then the shots came.
    She saw his death. She dropped her hand to the ground.
    There were terrible screams, then a cacophony of sound, and the air was filled with what appeared, to her jumbled head, to be flaming comets. The ground shook as she'd never felt it shake before, as if the whole cavern was collapsing around her. Then the noise and light were gone, and in their place an awful quietness.
    She was too late, too late for all of them. She'd wanted to call out to Cal, but hadn't.
    She wept dusty tears.
    She realized what a fool she had been. She should never have doubted Will! The Styx had tried to trick her into making the biggest mistake of her worthless, sorry excuse of a life. They'd even convinced Grandma Macaulay that Will was to blame. The poor, deluded old lady had believed their lies.
    It was so obvious to Sarah now that the Styx were purging their domain. Once she had served her purpose, she'd have been next in line for the chopping block.
    Why hadn't she trusted her instincts? She should have taken her life in the excavation back in Highfield. It had felt so wrong when she'd lowered the blade from her throat and allowed that little snake to persuade her to work with the Styx. From that moment of weakness onward, Sarah had unwittingly committed to a misguided manhunt for her own sons. A dumb cog in the Styx's grand plan. For that she could never forgive herself -- or them.
    She closed her eyes, felling her fluttering heartbeat, as if there were a hummingbird trapped in her rib cage.
    Maybe it was better this way, to let it end at last, right here and now.
    She flicked her dull eyes open.
    No!
    She couldn't allow herself the luxury of death, not quite yet. Not while there was the faintest chance she could put some of this unholy mess right again.
    She retained a sliver of hope that Will was still alive. She might be able to get to him. These thoughts pierced her brain like skewers, causing her as much pain as her injuries, and spurring her on.
    Using her arms, she dragged herself toward the place where Will had been trapped, but every action became more and more labored, as if she was clawing her way through molasses. She didn't let up. She'd covered a significant distance when she blacked out again.
    She came to, not knowing how long she'd been unconscious. There was no sign of Drake, but she heard voices nearby. She lifted her head and caught a glimpse of the Rebecca twins. They were issuing orders to a squad of Limiters at the very edge of the Pore.
    She knew then that she was too late to save Will. But could she exact revenge for Tam, for her mother, for her sons?
    Dominion!
    Yes, there was something she could do. She was willing to bet that one or both of the Rebeccas still had the Dominion phials on them. And she'd seen how