I did some thinking about Lux's magic and now I'm terrified...
... because that's definetly not LIGHT that she is using. Sure, it appears like a laser, but it definetly is something different.
A laser doesn't suddenly end at one point and it has a clear color. Also, it doesn't have an indicator. Ya know, that red dotted line? Let's take a look a that: Luxanna creates this red line and then performs some kind of triggering action at one end of it, resulting in a MASSIVE exothermic chain reaction going down this red dotted line. What that reaction is you ask now? It's the creation of an instabile and short lived plasma in a process that could be described as "forced nuclear fusion" that happens inside these "tiny red dots".
Now imagine: she doesn't have to arrange the dots in a line. She could spread them over an area in any way she actually wants. A line is only the simplest way, easier in fast paced combat I guess. With some time and a bit more mana usage she could probably spread these "dots" over an area of a small town and eradicate it within seconds.
To conclude: She's a living weapon of mass destruction. An atomic bomb in the shape of a human being. No surprise the demacian military was so keen on having her with them once they realized what she was potentially capable off.
Luxanna Crownguard might be one of the scariest mages of Runeterra, maybe even more dangerous than Syndra who can turn energy into mass at will and move it around as she pleases. I hope Syndra doesn't learn how to conjoure a mass singularity (aka a black hole), or else runeterra is completly screwed...
On top of that: imagine you being aware of the fact that you are a living weapon of mass destruction. The demacian dogma might be the only thing that keeps her still somewhat sane...
repelling to?
's space aids are deadlier.
creates an event horizon AKA a black hole
vs
so, E = m*(C^2) + p*C
given that C = 3*10^8, converting mass into energy (Lux nuclear R) is a lot more cost efficient than the reverse (Syndra Q).
assuming that Syndra's dark spheres have roughly the density of water, and they aren't exactly small (maybe 2 sq ft each) ... that's a bit more energy than a nuclear bomb.