Abusing the Kardashev Scale For Fun and Profit: Working their way up to this right now, the Empire has a couple of Dyson spheres, one under construction, the other completely dedicated to energy generation, plus other energy-generation facilities scattered here and there and about the place. This makes them, I believe, a solid Type II, although given the constraints of light speed, it’s going to take them a while to work up to III.
The Associated Worlds
…building civilizations with my space elves in space.
No Nicol-Dyson Laser?
Not as such, although there is a similar type of output-focusing weapon using a dedicated wormhole pair (to get around the problem of the light-speed constraint making Nicoll-Dyson Lasers very, _very_ slow weapons to use on anything at range) floating around in the blue-sky engineering division of the military research chaps. But I suspect it’s likely to stay there, on the grounds that the need to drag the firing half of the wormhole pair to the target at subluminal speeds makes _it_ impractically slow to aim, too.
I love the concept, but I can’t help but think that anything close enough to usefully track is inside its minimum practical range, and anything far enough away to fire at will have much too much time to dodge.
(Less of a problem in a universe with no FTL communications, of course, but even then, most things that’re a viable target for one of these and knows that they exist will keep on the move as a matter of course – except for actual planets, I suppose, but if that’s the most viable set of targets, trying to build one is the next best thing to actually posting a Notice of Intent to Commit Genocide in terms of attracting all the wrong kinds of attention.)