Necrons are characterized by strong ranged firepower and tough armor. They are known primarily for their trademark "gauss" and "reanimation" abilities. As robots made of "living metal", many Necron units possess the ability to reassemble themselves after being slain and fight on. In addition the "gauss" weapons carried by their troops have the potential to damage vehicles, making Necron troops a legitimate threat to enemy armor. Being machines Necrons possess maximum leadership across all units but are also extremely slow in melee. Necron armies often prefer to use overwhelming fire power as opposed to melee, though they do have several units capable of it. While fragile, Necron ground vehicles possess powerful shields that boost their armor, but are lost upon being penetrated. Being soulless, the Necrons have no psykers (though they do have some "spellcaster-like" units), which makes them somewhat more vulnerable to psychic attacks.