Leadership and Defeat
(Rule)Description: Necrons do not take Leadership tests — any test they would normally be required to take, they automatically pass. The Ld of 10 has been provided for convenience. If the entire Necron force is reduced to 25% or less of its original number at the start of any Necron turn, then the whole army will mysteriously vanish; the Necrons are assumed to have been driven away.
Necrons which have fallen down but not yet removed can‘t be counted as part of the remaining force, so a Necron army can be defeated if enough models are knocked down even if they are not permanently destroyed.