Purity (The X-Files)

Purity (also known as the "black oil") is an alien virus and a major antagonistic entity within the X-Files mythology, linked to the Colonists it is seen as part of their grand plan to conquer the universe and infect other species.

History
(a hostory of the species (for extremely long-running media keep it short-but-sweet to avoid overloading viewers not familiar with the series, keep spoiler to a bare minimum) )

Physical Description
(a description of how the species tends to be portrayed)

Traits
(any superhuman / unearthly powers or enhanced traits the race has as a whole)

Technology
(list of any notable technology the race uses (if any) - link to the page in the Star Chart)