South Pole

Several hours later, Chen Chen stepped out of the black sphere teleportation room, his body appeared extremely malnourished.

With the completion of the third reactor with a measured power of 10 million kilowatts, the USB drive was generating energy faster. During this time, he had instantiated several additional Gantz black spheres and had hidden one of them near the Earth Federation Headquarters to allow himself to freely navigate to and from there.

Chen Chen's cheeks were pale and sunken in. There was hardly any strand of hair left on his body. Anybody who saw this haggard display would mistake him for an elderly man approaching his death.

This was after two days of rest. His condition was slightly worse right when his transformation had ended.

With all that said, this was only temporary. Using the Black Knight's recovery progress as a reference, it should only take no more than a week for Chen Chen to return to his previous form.