The rest of Nergal's story was more or less the same self-imposed exile to his city, some of it filling in some blanks, but mostly a series of non-linear events because of how disconnected his sense of time was.
In the end, it didn't particularly matter to any of them anyway, Klaire, Kyubi, Lillim and most of the others had gone numb the moment they heard him talking about the eighth gate and they pieced together what he was trying to explain.
"Nergal... What are you not saying." Kyubi was already holding onto Klaire and they were both crying, then they fell to hold their children.
"Carl, is dead. Trapped in a realm filled with unstable and paradoxical energy, the energy of dead immortals, countless numbers of them."
The moment he finished speaking Tiamutael appeared next to him in dragon-form and swatted him across the surface of Haven, then disappeared as he pursued him.
