Oblivion is funky.
It didn't exist until that which could not die(Primordials) were killed by the Exalted.
It's not just no essence, it's like entropy on steroids.
Autobot is unique.
Makes sense that even his illness displays special snowflake characteristics.
The Underworld isn't working properly. Hasn't been since the Exalted killed the first bunch of Primordials creating Neverborn, but it chugged on.
And that was made worse when the Sidereals and Dragonbloods killed a bunch of very old, very powerful Solars in the Usurpation, leaving restless ghosts with a grudge who did deals with the Neverborn.
The culmination was when the Balorian Crusade killed literally 90% of Creation.
@Imrix or @Shyft could probably explain better, or maybe @veekie.
Note that this is Taylor's interpretation of things, with help from Iris.
For all we know, they could be wrong; Autobot has never died before after all
If Autobot dies, he's gone.
Engine of Extinction is a very different person from Autobot.
Oblivion wouldn't go for the same reason Oblivion didn't simply vanish after Creation died; there is more stuff to eat that is accessible/linked.
Auto's mortality links him to Oblivion while he is so close to death.
Since Auto has accessed the Nowhereverse, there is a link; he dies, it'll simply cross that link and continue eating it's way across the Nowhereverse until there's nothing left and nothing linked.
Only then will it vanish. Unless it finds yet another link somewhere else.
)
