Name: The Skrill
First Appearance: Wonder Woman tv series episode S2E10 (1977)
Abilities: Possession. The skills and abilities of whomever they possess. The means of stealing the mind, memories, and consciousness of an individual, leaving them a human vegetable. Space traveling capability. Gloves which fire paralysis rays. Command of powerful bloodthirsty aliens such as the Sardor.
Backstory: An alien species which is better compared to a plague than anything else. The Skrill were initially a simple and tribal people of their homeworld, due to the unusual nature of their homeworld which made understanding concepts such as geometry, distance, and and the concept of location in relative to oneself.
This would change however when an alien explorer representing the technologically advanced ‘Planetary Council’ would touch down on the mysterious world to explore it, only to discover that the Skrill have as a survival trait, evolved the ability to phase into the bodies of other entities, obtaining command of their abilities, and to an extent, their memories and knowledge.
With this, the Skrill claimed his spacecraft and took to the stars. Their ability to possess other beings allowing them to spread their species across the cosmos, leaping into bodies within the higher echalons of world governments, and conquering whole planets with the general populace none the wiser.
Discovering that to the intergalactic community the most valuable commodity was living consciousness, knowledge, and memories, the Skrill would develop a technology which allowed them to upload the minds of a victim into a crystal which could either be freely accessed for information, or transferred into another body either cybernetic or organic.
The Skrill would become famed amongst the criminal element of the universe for their domination of the illegal ‘mind trade’ selling the conciousness of their victims. For with the Skrills abilities, it was simplicity itself to invade a world, conquer it, and then harvest that world for all of its most valuable minds, and farming for intelligence.
So ominous was their reputation that should it be discovered that even one Skrill exists on a planet, many a space faring civilization would destroy the world in its entirety. So great was the threat that they pose to all civilization.