Any Inquisitor, Inquisitor Lord or Grey Knight Hero may take a single psychic power as listed below. If they possess a Familiar they may take an extra power per familiar. Abilities are used following the rules in the Warhammer 40,000 rulebook. A psyker may only use a single major power in a given turn unless he has Consecrated Scrolls (see the Daemonhunters Armoury on page 16).
Units of Grey Knight Terminators may upgrade to have the Holocaust power. See the Grey Knights army list entry for more details.
The psyker must pass a Psychic test in the appropriate phase to use any of these powers.
The psyker bends his indomitable will to the dissolving of the bonds that hold his daemonic prey to the material plane, forcing them back to the hell from whence they came.
Banishment is a psychic power that may be used at the beginning of any Assault phase. Daemons in base contact with the psyker or the squad he is with roll 3D6 when testing for Instability, and add the two highest dice rolls for the result. This effect lasts until the end of that Assault phase.