okay one thing that bothers me here is that the hive didn't make necrochasm. we did. the hive made the husk of the pit. the [u]pit[/u]. the fact that it says pit makes me feel like he lost inferno aka husk of the pit inside the abyss we know as the first part of crotas end raid especially since he lost it by bashing it into a skull(thralls also have very easy to hit skulls) and had to leave it because a swarm of "demons" as we all know the abyss is full of swarms of endless thralls which I would quickly think of as demons. and it would be fit that Azzir would be in the abyss as the darkness literally drowns all light out and I feel he had a certain hatred for the light after that night he transformed into Dredgen Yor. he calls it a crutch. I understand this was before crotas sword "split the moon" but whose to say that hole wasn't already there? lore doesn't deny that it was there I don't think. there was clearly already darkness there as Azzir gave into that darkness anakin style.
Technically it could be necrochasm because husk of the pit is the starved version of necrochasm after disuse. The same thing happened to thorn which is why we feed them both
I answered this earlier and will edit it in to the post to clarify. Technically you are correct, Inferno would be the husk. But the husk doesn't have a grimoire card, and the grimoire basically treats all three husk/eidolon/necro as the same gun so I did too.
For example, grimoire says necrochasm (not husk) was created at the time when crota cracked the moon. But in the game, we "create" necrochasm in current time.
Yeah I saw another reply that said it's like they are the same gun as the hive fused their logic with it and we just let it kill a god making it very powerful.