DROPZONE SCOURGE

The Scourge are a race of neuro-parasitic lifeforms that thrive on conquest and absorption of other sentient races. Their assimilation of the Cradle Worlds and Earth have made the Scourge the primary threat to humanity's existence, as well as showcasing the threat they pose to all life in the galaxy.

Of note, "Scourge" is the name given to the race by humans. What name they have for their species, if any, is unknown.