If a model with this special rule rolls a natural 6 when making a roll To Wound for an attack made in combat, it has struck a 'Killing Blow'. Enemy models whose troop type is infantry or cavalry are not permitted an armour or Regeneration save against a Killing Blow (Ward saves can be attempted as normal). If an enemy model whose troop type is infantry or cavalry suffers an unsaved wound from a Killing Blow, it loses all of its remaining Wounds.

Note that if an attack wounds automatically, this special rule cannot be used.