Part 1 of seven
The Ashbed
The Ashbed, 3,000 m down · the animal is 0.47 m
It did not hatch. It failed to be contained.
There is a difference, and the difference is the whole of what it would become. A thing that hatches has decided something. A thing that fails to be contained has only continued, at pressure, until the wall gave out.
Before that, there was the Ashbed, and the Ashbed was simple. Heat came up through the floor in a slow column. The rock at the bottom of the shaft held it the way a cupped hand holds water, badly, for a while. In the hot dead-end where the column stalled, nine eggs stood in a rough ring, and had stood there long enough that the floor had grown up around their bases in a pale collar.
The eggs were not laid. Nothing carried them there. They had accumulated, the way frost accumulates on the cold side of a stone, except that this was the hot side and what accumulated was heavier. Each was a little under half a metre tall, blunt at the base, tapered at the crown, and dark -- so dark that the only way to see one was to look for the places where it was not.
Those places were the seams.
Every shell had them, three or four running from base to crown, and they glowed. Not brightly. A seam was the colour of the inside of a closed eye, and it pulsed on a slow count, brighter and duller, brighter and duller, because inside the shell something was banking and unbanking a fire it did not know it had. The seams were where the shell had failed to close. They were also, and this is the part the surface would never understand, the only reason the shell had lasted this long: heat has to leave. A perfect shell would have burst in a month. A cracked one could hold for years.
So the egg's flaw was the egg's life, and the flaw got wider every year.
For a long time the ring of nine was the entire world, and the entire world was patient.
Then the shellbiter came.
It came the way everything in the deep comes: sideways, and without warning, out of a gap too small to have been worth watching. It was long and flat and the front third of it was one continuous wedge of head, and it moved by gripping the floor with the underside of its body and pulling. It had no eyes. It did not need eyes. It had come three hundred metres through solid dark on the strength of one fact, which was that a seam that glows is a seam that has given up, and behind it there is yolk.
It went to the nearest egg and set the point of its head against the widest seam and began, patiently, to work.
The egg could not run. This is worth saying plainly, because everything that came afterward was shaped by it. There is no version of the story where the egg runs. It could only continue, at pressure, and hope that the pressure won first.
For that egg it did not. The shellbiter got a purchase, then a wedge, then a hand's width, and then the seam ran the rest of the way on its own with a sound like a knuckle cracking in an empty room, and the glow came out all at once and lit the whole chamber orange for about two seconds. In that two seconds, eight eggs stood in a ring and cast eight long shadows on the wall, and then the light went into the shellbiter's mouth and the chamber was dark again.
It ate for a day. Then it moved to the next egg.
It took a second one the same way, and started on a third, and the third was ours.
The thing inside the third egg had no name for what was happening and no concept of danger, because it had never met anything at all. What it had was a seam that had been widening for eleven years, and a body pressed against that seam, and a rising, choking, particular discomfort that had been getting worse for a month: the yolk was gone, the fire had nothing to bank, and the air inside the shell had been breathed too many times.
It was suffocating. It had been suffocating for a month. The shellbiter's wedge came through the seam and let in a thread of air that was cooler and cleaner than anything the animal had ever had, and it did the only thing a creature in that condition can do.
It inhaled.
The vents down its flank -- eleven of them, each no longer than a fingernail -- drew, and the fire that had been banked for eleven years found air, and the shell did not so much break as stop being relevant. It went out in six pieces. The animal came out with it into a wash of heat and light, into a chamber it had never seen, half a metre tall and blind and screaming a thin sound that nothing in the deep had ever made before, directly into the face of the shellbiter.
The shellbiter, which had no eyes and had never in its life encountered anything that was hotter than it expected, flinched.
That was all. It did not die. It flinched, and pulled back a body-length, and by the time it had gathered itself the ring was in chaos -- because a shell that fails takes its neighbours with it. The heat and the noise and the sudden free air had run round the ring like a rumour, and one seam after another was widening, and the chamber filled with that knuckle-crack sound, over and over.
Of nine eggs, two had been eaten. Three failed to open at all and stood in the dark afterward like stumps.
Four came out.
They stood in the wreckage, four wet, furious, half-metre animals with heads too big for them and eyes too big for their heads, and they had no idea what they were, and they were already hungry.
The first thing our animal ate was its own shell. It ate the fragments for the grit and the calcified rind, and while it ate it found the shell was crawling with rockfleas -- thumb-sized, hard-backed, living in the grit at the base of the collar -- and it ate those too, hundreds of them, snapping at the floor with a jaw that did not yet close properly.
That is the closest thing to a gift the deep ever gives. Your first meal is the wreckage of the thing that kept you alive.
The shellbiter was still there. It had gone back to the two unopened eggs, because eggs do not flinch. The four hatchlings watched it work with their enormous eyes and did not attack it, because it was six times the length of any of them, and even at a day old they could see that.
Instead they went up.
Not because they had decided to. Because the air at the bottom of the Ashbed was thin and old, and their vents were open now, and four small fires in one dead-ended chamber use it up fast. They went toward the draw. There is only ever one direction where the air is better, and the deep is generous about telling you which one it is.