chaosblade
Unconfirmed Member
Technically you can go back there for a bit;.Agniratha might've looked like it exploded in the cutscene after the fight with Yaldabaoth, but in fact the teleporter that brought you there in the first place is still active, you can waltz right in, and the town will look none the worse for the wear. I even did all of the side quests available here after clearing the fight with Yaldabaoth but before tackling Mechonis Core, which is where the real point of no return lies
I'm pretty sure that's actually an oversight by the developers, not intentional.
But yeah, you can go back there during that small window.