When a model with this special rule is in base contact with another friendly model that also has the Moving Bulwark special rule, both models increase their Invulnerable Saves by one step (i.e from 5+ to 4+) to a maximum of a 4+ Invulnerable Save.
An Iron Circle Maniple composed of at least three models may be selected as a Retinue Squad in a detachment that includes Perturabo, instead of as an Elite choice. An Iron Circle Maniple selected as a Retinue Squad counts Perturabo as its leader for the purposes of this special rule. An Iron Circle Maniple selected as a Retinue Squad must be deployed with Perturabo deployed as part of the unit and Perturabo may not voluntarily leave the Retinue Squad during play, Domitar-ferrum that are part of an Iron Circle Maniple chosen as a Retinue Squad for Perturabo gain the Feel No Pain (5+) special rule.
Wrack & Ruin: When a model with this special rule makes a Shooting Attack or Melee attack targeting a model with the Dreadnought, Automata, Vehicle or Building Unit Type it gains +1 to the Strength of that attack.
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.
If a model with this special rule ends its Charge Move in base or hull contact with an enemy model, it makes a number of additional attacks equal to the value in brackets listed as part of this special rule.These attacks hit automatically and are resolved at the models unmodified Strength with AP-. These attacks do not benefit from any of the model's special rules (such as Furious Charge, Rending, etc.).These attacks are resolved during the Fight sub-phase at Initiative step 10 but do not grant the model an additional Pile-in Move. If a model with this special rule Charges a Vehicle of any kind or a Building, the hits are resolved against the Armour Value of the Facing the charging model is touching. If the model is in contact with two or more Facings, the player controlling the target model chooses a Facing upon which the attacks are resolved. If a model with this special rule Charges a Building or Vehicle that is a Transport, the hits are resolved against the Building or Vehicle, not the unit Embarked within the Building or Vehicle.
When a model with this special rule suffers an unsaved Wound, it can make a special Feel No Pain roll to avoid being Wounded (this is a special Saving Throw which is made after unsaved Wounds are suffered). Feel No Pain rolls may not be taken against unsaved Wounds that have the Instant Death special rule. Roll a D6 each time an unsaved Wound is suffered. On a result that is equal to or greater than the value in brackets, the unsaved Wound is discounted - treat it as having been saved. On any other result the Wound is taken as normal. For example, a unit with the special rule Feel No Pain (5+) would need to score a 5 or 6 in order to discount a Wound inflicted upon it. This is a Damage Mitigation roll - any model may make only a single Damage Mitigation roll of any type for any given Wound (see page 174).
