Ballard lets go of the rope and launches herself into the light. After a moment, breathless, Clarke follows.

There's so much power here, so much wasted strength. Here the continents themselves do ponderous battle. Magma freezes; seawater boils; the very floor of the ocean is born by painful centimeters each year. Human machinery does not make energy, here at Dragon's Throat; it merely hangs on and steals some insignificant fraction of it back to the mainland.

Clarke flies through canyons of metal and rock, and knows what it is to be a parasite. She looks down. Shellfish the size of boulders, crimson worms three meters long crowd the seabed between the machines. Legions of bacteria, hungry for sulfur, lace the water with milky veils.

The water fills with a sudden terrible cry.

It doesn't sound like a scream. It sounds as though a great harp string is vibrating in slow motion. But Ballard is screaming, through some reluctant interface of flesh and metal:

"LENIE—"

Clarke turns in time to see her own arm disappear into a mouth that seems impossibly huge.

Teeth like scimitars clamp down on her shoulder. Clarke stares into a scaly black face half a meter across. Some tiny dispassionate part of her searches for eyes in that monstrous fusion of spines and teeth and gnarled flesh, and fails. How can it see me? she wonders.

Then the pain reaches her.

She feels her arm being wrenched from its socket. The creature thrashes, shaking its head back and forth, trying to tear her into chunks. Every tug sets her nerves screaming.

She goes limp. Please get it over with if you're going to kill me just please God make it quick— She feels the urge to vomit, but the 'skin over her mouth and her own collapsed insides won't let her.

She shuts out the pain. She's had plenty of practice. She pulls inside, abandoning her body to ravenous vivisection; and from far away she feels the twisting of her attacker grow suddenly erratic. There's another creature at her side, with arms and legs and a knife—you know, a knife, like the one you've got strapped to your leg and completely forgot about—and suddenly the monster is gone, its grip broken.

Clarke tells her neck muscles to work. It's like operating a marionette. Her head turns. She sees Ballard locked in combat with something as big as she is. Only — Ballard is tearing it to pieces, with her bare hands. Its icicle teeth splinter and snap. Dark icewater courses from its wounds, tracing mortal convulsions with smoke-trails of suspended gore.

The creature spasms weakly. Ballard pushes it away. A dozen smaller fish dart into the light and begin tearing at the carcass. Photophores along their sides flash like frantic rainbows.

Clarke watches from the other side of the world. The pain in her side keeps its distance, a steady, pulsing ache. She looks; her arm is still there. She can even move her fingers without any trouble. I've had worse, she thinks.