Nemesis Void Seeders
Void Seeders are a race that can interact with the minds of crew members. They will have few nests instead of one, but only one strong fighting presence at given moment. Once killed, new one will be awakened from the most developed nest.
This race will focus on whispering and controlling minds - people who will be near them will start to hear voices commanding them to do different destructive things.
Nemesis expansion. Core game required.