Some creatures have been given a value of '0' (often shown as a dash: '-') for certain characteristics, which means that they have no ability whatsoever in that skill. This usually applies to creatures unable to use missile weapons, so they have BS0 or BS-, but it might equally well apply to other characteristics too. For example, some creatures or war machines may have no Attacks (A0 or A-). In some cases a model might have a characteristics value of '*'. This means that characteristic uses a special rule rather than a number.

If any model has a Movement value of 0, it cannot move at all for any reason, unless it has some special rule that allows it to move another way.
If any model has a Weapon Skill of 0 then it is unable to attack with its normal attacks or defend itself in close combat, and any blows struck against it will therefore automatically hit. A model with Ballistic Skill 0 cannot use any missile weapons that require To Hit.

If at any time a model's Strength, Toughness or Wounds are reduced to 0 or less by magic or a special rule, it is slain and removed from play.