During Nigreosis's early years, the Xildra species flourished, matching the Nigreosians in population and perhaps even passing it. The two species worked together, under the rule of the ρμάσlες Empire, to build the vast subterranean cities that, blanketed by the expansive desert, eventually covered the planet. Racism and malice began to pass between the two major species, their different religions being the dominant factor of this hatred. The Xildras grew to be hungry for power and influence and jealous of the Nigreosians' rule. Civil war broke out between the two. Overwhelmed by the sheer numbers of the Nigreosians, the weakened Xildras surrendered, and the war came to an end. A few years later, a revived hatred of Xildras caused an act called the Mass Xildra Purge. This had devastating e