Unless noted otherwise, if the effect of a special rule in some way alters a characteristic, the result of a dice roll, or any other value (such as a model's armour value), that effect is cumulative. This means that the effects of duplicate versions of the same rule combine together, increasing its effect.

For example, if a model is under the effects of a spell that grants it Armour Bane (2) and carries a weapon that has Armour Bane (1), the model would be considered to have Armour Bane (3).