Jem'Hadar

The Jem'Hadar are a genetically engineered species of humaniod Sapients created by the Dominion to serve as infantry and spacecraft crews. They are easy to make out by their scaly. Jem'Hadar are incapable of sexual reproduction and are mass-grown in cloning facilities, mature and learn quickly, thus allowing for rapid production. They require no food after maturation (save for White, see below), nor do they require sleep and have a built in ability to shroud themselves, making them invisible. They are very effective soldiers and are normally fanatically loyal to the founders. However, to ensure loyalty, they have an built-in dependency on the drug Ketracel-white, which, along with being addictive and providing all the necessary sustenance they require to keep adult Jem'Hadar alive. Without Ketracel-White, they go through withdrawal, which ends in them going into insane bloodlust and eventually death. This was exploited during the Dominion War by the Alpha Quadrent powers whom set about destroying white production facillities.