The Nil (Taxonomically Silent brutis; dubbed Stalkers by humans) were an aggressive, large species. They featured a unique biology, and were easily recognizable for their variable (yet always astounding) height as well as appearance. They were very muscular beings, yet were capable of stealthy military tactics. Their encounter's with humanity were generally rare, do to their distance from human territory. Upon first contact, a brief war raged between the nil and the Interstellar Union, upon defeat, however, they reluctantly joined. Rouge factions weren't uncommon do to the lack of law enforcement in their celestial territory.
A Nil spec ops officer
A Nil general
A species native to the Nil homeworld that the Nil often use as a form of cavalry.