Description: When a value or a roll is set to a certain value, replace the modified value or the required roll with that value. For example, if an attack is subject to the effect The attack's Armour Penetration is set to 10, you replace the attack's Armour Penetration value with 10.
A Characteristic may be set to the value of another model's Characteristic. In this case, the value of the other model's Characteristic is taken after applying any modifiers that the other model is subject to. Modifiers that affect the recipient model will then be applied to this value (following the rules in priority_of_modifiers below). For example, if a model has the rule The Discipline of all units within 12" may be set to the Discipline value of the model, all units affected by this modifier may ignore their own Discipline and use the model's Discipline instead.