Isolation
(Rule)Description: Necrons ordinarily must maintain squad coherency as is normal for a squad. However, ―active‖ Necrons do not need to maintain this coherency with Necrons which have been downed in combat and are attempting to repair themselves. Thus a Necron which repairs itself may find itself outside of normal coherency to the rest of its squad. Necrons in such a condition are said to be isolated.
Necrons which recover must try to join up with a Necron unit of the same type as themselves or with another individual model of the same kind. Until it does so, the Necron is isolated. Isolated Necrons cannot shoot, although fights as normal in all other respects.