Relentless models can shoot with Heavy or Ordnance weapons, counting as Stationary, even if they moved in the previous Movement phase. They are also allowed to Charge in the same turn they fire Heavy, Ordnance, or Rapid Fire weapons.
In a turn in which a model with this special rule Charges into combat, it adds a bonus to its Initiative Characteristic until the end of the Assault phase. The bonus added to the model’s Initiative is equal to the value in brackets after the special rule; for example, a model with Sudden Strike (2) adds a bonus of +2 to its Initiative. A model that has made a Disordered Charge that turn receives no benefit from Sudden Strike (X).
When a unit composed entirely of models with the special rule declares a Charge targeting a unit that is Pinned or Falling Back, the Charge roll gains an additional +1 modifier, and if the Charge is succesful then all models in the Charging unit gain +1 Attack for the duration of the turn in which that Charge is made.
All enemy models within 12" of a model with this special rule must reduce their Leadership by the value in brackets after the special rule when taking any Morale checks. Regroup or Pinning tests. For example, a unit with the special rule Fear (2) would reduce the Leadership of all enemy models within 12" by 2 Enemy units that are locked in combat are only affected by this modifier if they are locked in combat with the unit that causes Fear. This modifier is not cumulative, and any given unit can only be affected by a single instance of the Fear special rule at a time.This will always be the highest single modifier among those applicable. A model that causes Fear is not itself immune to Fear and will still suffer a penalty to its Leadership if within range of an enemy unit that has the Fear special rule.
A unit that contains at least one model with this special rule ignores the effects of Night Fighting (see page 308) and no model may make Shrouded rolls to negate Wounds inflicted by their attacks.