Blocked Entrance in new Dwarven City Help

[PrivateBlade]

Has anyone figured out what combination of characters will let me into the ruined entrance of the dwarf city? There must be a way inside. Ive tried Grukly with Wilbur and Heiner but nothing...

[Englishdude]

This is my progress so far:
Grukli, Cornelius, Wilbur, Nezglekt have all had interactions. I have always brought Heiner, so I have not brought just the 4 I've had interactions with as a group.
I've brought Nezglekt to Tsnemo after and it didn't change anything

All of them are a lore / history tidbit and have the "Extreme Heat makes you leave" line.

Evelyn is mentioned when you read the Dwarven Book instead of doing a character interaction, but she does not have an interaction when brought so far.

I tried bringing a kidnapped fire cult pigman from Act 1, they did nothing.

I have tried bringing multiple items in from previous acts (Moonstone, Torch, Fish) so far and have not had luck. I'm trying to scour the Blue Biome for anything that might resist heat and be in my adventuring inventory but no luck yet.

I'll probably try Nez Cor Wil Gruk as one party tonight and see if I have luck with all 4 of them there.

I have also definitely checked:
Ottis, Sylvie, Thuls
and I'm pretty sure I've checked Magnus, Yogger, Andrin, Malukah.

Definitely not checked: Zek, Reginald, Gustav, Bree

[Englishdude]

Friends have also suggested they are suspicious of the long tunnel on the bottom track, as it seems to aim in that direction on the map display, but I have not had any interaction beyond the Emerald / resources shuffle game so far

[Englishdude]

No luck bringing all 4 of them with Red Act 2; all gossip options are the same, the journal is the same. Unless it is one of the yet unchecked characters or inaccessible, I am more leaning towards it being an item from a previous biome.

Could be a future (err, past) DLC similar to Wolf Wars considering everyone talks about it in the past tense

[Corydonn]

This was intended to be the next entrance to the DLC since the Wolf Wars had a similar entrance before it was added. Unsure if it's going to be done now that people have responded with feedback that they don't like that kind of content.