Blind Missile
(Rule)Description: Blind Missiles may be aimed against any visible piece of ground. Models may not see through, or into, or out of, the blind marker. Models may not use targeters or infra-vision to see through the marker. Psykers may not see or use their powers through the marker.
Any models within the blind cloud have the choice of remaining stationary, or moving at half rate in a random direction. Opposing models in hand-to-hand combat within a blind cloud may fight, but will only hit their enemy on the D6 score of a 6
See Wargear Rulebook pg. 43 for further rules