Why is Lyxal so Lyxal?
After being spawned by interspacial imps, the Lyxal have been raiding civilization on and off since the dawn of time. A few hundred years ago Lyxal were even a major player in human culture, by far the most populous species that inhabited most of Earth. Some of their writing and art is still visible in many places, and they had plenty of technology at their disposal before they began to go extinct. Scientists are still trying to determine why Lyxal went extinct (perhaps climate change or over-hunting) but some think that it may be related to them being too successful or too dangerous for the humans to successfully keep them in check.
Lyxal have been known to construct cities that are far larger than anything the humans could build, structures that rival even the pyramids. Some of their cities are also self-sufficient and require no outside source of food or water. A few of these cities are still standing today but most of them were destroyed when the Lyxal attacked in their final days. Even though Lyxal cities are now a thing of the past, many relics from those ancient civilizations still remain, such as statues and buildings with Lyxal writing in them.
Lyxal were very aggressive towards other species, including humans. Many theories have been put forth as to why this is, including that they possessed superior technology or that they were simply hungry for conquest. Many scientists believe that the Lyxal did not have a reason to be hostile because they had no real competition for resources or space on Earth (aside from other intelligent species) at the time.
There is some debate over whether all Lyxal became extinct together or if some just became more peaceful and ceased raiding other planets altogether. If they continued raiding other planets, why did they stop? It is possible that they just ran out of places to raid because there was nothing left to raid. However it's also possible that once they started raiding these places, there was a point where they realized that they were going to lose and thus stopped raiding. The truth may never be known but it is likely one of the many mysteries still being debated by scientists today.
Culture
Lyxal culture is anything but uniform. Most species exhibit at least one trait in common: they are all very intelligent. A lot of the time this intelligence comes in the form of an extreme lack of common sense, but that depends on the individual Lyxal and not necessarily its species. For example, some are very bad planners and some have trouble communicating due to their rather unique language. Many of them are just downright stupid, but there are exceptions like Lyxal-2 and Lyxal-3 which are quite clever despite being members of completely different species (they share a common ancestor though). A few species have even developed sentience; thus they are all categorized amongst society as "intelligent".
Most Lyxal do not have much interest in politics or world affairs, however most do have some sort of fascination in them due to their close proximity (or possible past) with humans and other sapient species. They don't really understand why humans would want to fight so much, or why they care so much about which color skinned sapients live where but they do appreciate any form of recognition that can be gained from humanity for their assistance during the war with Vinzia (the Vinzian Empire). This is reflected in many of their artworks; most notably their war propaganda posters which detail various battles between Vinzia's forces and the Fiend Army. These posters also graphically show how humanity was suffering under Vinzia's occupation. A few even depict Vinzian atrocities against humanity such as mass executions. The Fiend Army's propaganda posters were always very similar since they were created by the same artists on both sides (though