The Spider Knights are a very secretive Chapter that are believed to be of Raven Guard linage. Though their numbers are a closely kept secret they are believed to be above standard Codex regulated numbers, though to what extent is unknown even to the Inquisitors the Chapter often works with. They are very independent from the rest of the Imperium even through they are based within the Segmentum Solar. They specialize in covert operations and surgical strikes, eliminating entire cells of enemy forces as subtly as possible. When on the front lines, they hit the enemy where it is weakest and exploit every chance they get to strike when and where they have the advantage.