Hakolian
The Hakolians are a brutal race of invaders from Hakol. They have unusual technology, combining both psychic powers, biological matter and true technology.
The Hakolians need power sources for their technology, which is the reason behind all their invasions. They need primitive and superstitious races for this, which they found in the Humans of the 1600s. The first stage of an invasion is sending a probe (such as the Malus) which searches the surroundings and tries to stir up some chaos. (DW: The Awakening) The next stage is sending a war creature (such as Jarek) to create an army of loyal and violent solidiers. (DW: The Hollow Men) The final stage is sending the actual Hakolians. The flaw in this invasion is that the process of creating violent individuals also causing sterility, meaning the conquered people die out quickly.
The Terileptil used to mine tinclavic for the Hakolians, but even they were appalled by the senseless terror and carnage that they turned against them. (DW: The Hollow Men)