With bright light and 5 minutes burn time, this is required equipment for any cave-diver worth his salt.
Once little more than a standard place of higher education, now the University of Firdon sits at the heart of the magidustrial revolution soon to sweep through Ryngard.
"See that one, with the burn scars and dark veins? Don't stick too close; he shoots fireblood before engagements. Keeps friends and foes alike at bay, it does."
The simplest way to tell if someone is a Thaumatech Engineer is often to ask to see his kit bag…
Thaumatechnology - in a world where straight magic has an unnerving tendency to get the user killed, either by magical catastrophe or by being lynched by an upset mob, this is a much safer form of magical use… Even if it does occasionally explode.
A cave with weapons sunken into the walls, blades sticking out of the floor and ceiling, and so on. Possibly, any weapon used in it could be torn out of the hand and sink into the stone.