Skithra

The Skithra were a species of alien scavengers and plunderers.

Biology
Skithra resembled giant scorpions with red eyes green armor. They were a hive species meaning their Queen was connected to the totality of the race. If she died the entire hive would. They were capable of firing an electrical energy from their stingers. When charging the stinger would glow green and would turn red when about to be fired. They had also stolen shape-shifting technology, allowing them to disguise themselves as any person.

Background
During the 19th century the Skithra had accumulated technology from the Silurians, Venusians, Klendov, and Dullirians. However their technology had begun to break so in order to locate a skilled mind for repairs they sent out a repurposed Orb of Thassor to Earth. In 1903 Nikola Tesla discovered the Orb and inadvertently responded to their message, marking him to be targeted by the Skithra. Their plans were eventually foiled by the Doctor, by outwitting their queen and sending all the Skithra back to their ship and flying away.

Culture
A scavenger race, the Skithra stole the technology of other species. They believed themselves to be a superior race and were entitled to take what was. However they lacked the will to understand the technology they stole, thus their technology would degrade prompting them to locate an adequate engineer and force he or she to repair their technology.

Appearance

 * Doctor Who Season 12: Episode 4: Nikola Tesla's Night of Terror