Slivers

Slivers are a unique breed of creatures that share a hive mind, enabling them to share abilities and thoughts. They appear to look human, for the most part, however, the only thing that makes them Slivers is their bifurcated, whip-like tails, plus their hard plated skin on their shoulders and fore-arms. They have three ranks: The Queen, The Drones, and The Soldiers. The Drones are the ones who convert female humans into Slivers, and use them to breed for the hive. The Soldiers reproduce for the sake of the Hive, and protect it. They also bring suitable males to the Queen. Some Slivers are less rape-happy than others, but they don't last long. They're usually killed by the Hive in order to ensure the survival of their kin.