So, uh, just thought I'd put my own two cents in on this whole steam engine debate. For one thing, I'm fairly certain the dwarves already have steam technology, right? So that would be pointless. On the other hand, this isn't steam technology, since it's not based on superheated water, but instead producing pure heat and light. That's a combustion engine, whcih in my admittedly almost non-existent knowledge of engineering is a whole other ballgame. Or as someone previously mentioned something equal to nuclear reactions in terms of energy, just done by essentially removing radiation instead of producing it. Either way, it could be extremely useful if done correctly, but convincing anyone with the actual knowledge and ability to make it work would be almost impossible. On the other hand, I'm currently imagining Dwarves in tanks, jets, and cars, all while reducing the total amount of Warpstone in the world. If nothing else the idea of using a combustion engine could be interesting, should we decide warpstone isn't a very good fuel source for myriad reasons.