The underground bunker was built during the old-modern era; of course, the building materials of such a structure were merely magically reinforced, not built with alien materials like Netherstone or Abyssium, or with modern blacktech.
It wasn't a surprise that the thick blast door could give way to that explosion. After seeing the young mercenary's lasers earlier, Abraham had a pretty good idea of what had just happened.
The crew in the APC held their breaths, as though breathing would call upon the wrath of the gods. They remained seated, staring at each other like mere rats frozen in the sight of a big cat.
Except, of course, the C-Class Executioner, Black Zero.
