Sanctioned Psyker - Notable Sanctioned Psykers: Astropaths - Astropaths, or "astro-telepaths," are psykers who are responsible for carrying out all of the superluminal communications that tie the Imperium of Man together using their telepathic abilities. Those chosen to become astropaths undergo the ritual of Soul Binding, in which the body and soul are scoured clean of the taint of the Warp by the searing purity of the Emperor of Mankind's beneficence. During the process, their minds are subtly reshaped by the Master of Mankind to possess the willpower and fortitude to resist the temptations of the Immaterium. So intense is the ritual that the supplicants' sensory organs are almost totally overloaded -- leaving them blinded by the experience -- with many suffering further nerve damage, incurring loss of smell, touch, or hearing. Being soul-bonded with the Emperor is necessary, however, as it greatly heightens an astropath's already formidable psychic powers and gives them the ability for which they were chosen -- to send telepathic messages through space instantaneously across large interstellar distances, thereby becoming the main network of interstellar communications in the Imperium. Most Imperial starships have an astropath or astropathic choir on board and most advanced Imperial planetary governments have access to large astropathic choirs.Navigators - A Navigator (Homo navigo) is a very particular form of Imperial-sanctioned Human mutant who possesses the Navigator Gene. This gives a Navigator the unique ability to navigate a faster-than-light starship accurately through Warpspace. This ability makes Navigators absolutely essential to the Imperium's continued survival and to all interstellar transportation, communication and commerce. All Navigators have a third eye, commonly called the "Warp eye," on their foreheads, which allows them to perceive the "psychic light" known as the Astronomican, enabling them to fully use their powers in guiding Human starships through the treacherous currents of the Warp. Their ability to sense the energy tides of the Warp is considered psychic, although Navigators never possess any psychic abilities beyond the powers their Warp eye affords them. Navigators possess natural life spans of as much as four hundred standard years. As they increase in age, their abilities increase in power, and their physical appearance changes: the white and iris of the eye gradually disappears, leaving only a hardened black orb, and far more extreme mutations are also possible. All Navigators belong to a large group of Highborn noble families based on Terra in the great district of that world-city known as the Navigator's Quarter. These dynasties are known collectively as the Great Families of the Navis Nobilite.Primaris Psykers - Primaris Psykers are rare and extraordinary individuals who serve in the regiments of the Astra Militarum as battle-psykers and wield the destructive power of the Warp as a weapon to smite the enemies of the Emperor. With a single thought they can conjure forth lightning that leaps from their hands and surrounds their body. With a gesture the psyker hurls these bolts of aether-energy at their opponents, burning the foes' synapses and searing their flesh from their bones. Mysterious and aloof, Primaris Psykers, also known as "primary-psykers," "battle-psykers" or "psyker-lords," are treated with a mixture of awe and fear, but most of all, suspicion by the superstitious soldiers of the Imperial Guard. Though their presence is utterly abhorrent to all right-thinking Imperial servants, their ability to combat the blasphemous magicks of the xenos and Heretics usually outweighs the natural revulsion all their comrades feel at the inclusion of psykers in the ranks of the Astra Militarum.