Necron kill teams are chosen by an Overlord from amongst his most favoured warriors. They can vary greatly in composition, though the kill teams are invariably led by elite troops such as Immortals that have retained some of their individuality and extensive combat experience during the long sleep. Far from unthinking machines, Necrons have been known to display truly inspired levels of cunning, though their predominant strategy is to obliterate their foes from afar with a relentless storm of atomising gauss energy. Necrons are also capable of automated self-repair, and are able to recover from even the most traumatic damage to rise once more and continue fighting.