It was inevitable that I would have to abandon my mortal body and live exclusively in the processors of the Coryphaeus and in the cloud of Hypothetical nanotechnology surrounding Vox Core. But I still wanted to be able to move about the city in a physical way. So—as I allowed the body of Isaac Dvali to lie in a self-induced coma, dying of starvation—I fashioned a more durable substitute, a robotic body equipped with equivalent senses, in which I could instantiate my consciousness. When this project was complete I gathered the remains of my organic self in my inorganic arms and carried the corpse to a recycling station, feeding its useful proteins into the closed biochemical loops of Vox Core. I felt no remorse or grief, and why should I? I was what I had become. The fragile meat in which the message of myself had first traveled to the stars, the old somatic galaxy in its border of skin, I gladly fed to the city’s forests.

Vox Core wasn’t an entirely self-sufficient system. I was forced to harvest trace elements from stellar nebulae in order to replenish what couldn’t be recycled. Of course, in the long run, Vox Core was as mortal as all baryonic matter, even inside its temporal fortress. It was only a question of time.

*   *   *

I courted the end of all things.

Vox Core fell into a long elliptical orbit of the galactic core. I began to divide my awareness into saccades, moments of perception separated by long periods of inactivity, so that experiential time passed more quickly, even inside the temporal bubble surrounding Vox Core.

Entropy—in the form of broken chemical bonds, irreparable system failures, radioactive decay—gnawed at the city’s vitals. Blight and drought decimated the forests and rubble began to obstruct the public walkways. Maintenance robots expired for lack of maintenance. Atmospheric regulators—the city’s lungs—gasped and finally failed. The air of Vox Core would have been toxic, had there been anyone alive to breathe it.

The quantum processors of the Coryphaeus continued to function, protected by multiple redundancies. But that, too, was only temporary.

The universe grew colder. The galaxy’s stellar nurseries, the concentrations of dust and gas that gave birth to stars, had grown too thin to be fecund. Old stars guttered and died and were not replaced. The Hypothetical ecology retreated from this encroaching darkness to the galaxy’s dense core, harvesting the gravitational gradients of massive dark holes for energy.