>>96862467
The Protomatter Spawn (Aldermen) only attacks if attacked first

>"If attacked, it reacts mindlessly to seize, crush, and absorb."

If your players are smart, they won't just immediately start attacking it. They can ask it for valuable information or leads, and THEN set fire to the building.

I think getting rid of it is a bad idea. It's a truly horrific sight and adds a lot to the overall "fucked up" factor of the scenario.