Certainty and Resolve "Models with this Special Rule are never removed as Casualties when they Fall Back into a Battlefield Edge, and are more likely to have the Routed Tactical Status removed from them in the End Phase."
When any Models in a Unit entirely composed of Models with this Special Rule enter contact with a Battlefield Edge within the Controlling Player’s Deployment Zone as part of a Fall Back Move, that Unit automatically loses the Routed Tactical Status and gains the Suppressed Tactical Status. Additionally, when making a Leadership Check in the Statuses Sub-Phase of the End Phase to remove the Routed Tactical Status from a Unit entirely composed of Models with this Special Rule, the Controlling Player may roll an additional Dice, discarding the Dice which, once rolled, has the highest result.
Inductii "A Unit containing any Models with this Special Rule may never be used to select a Prime Advantage."
When a Unit that includes any Models with this Special Rule is selected to fill a Prime Force Organisation Slot, no corresponding Prime Advantage may be selected.
Line (X) "A Unit of Models with this Special Rule can control Objectives more easily and scores more Victory Points from controlling an Objective."
If a Unit that Controls an Objective includes a majority of Models with the Line (X) Special Rule then, whenever the Controlling Player scores Victory Points for Controlling that Objective, an additional number of Victory Points equal to the value of X are scored. For example a Unit of 10 Models of which the majority have the Line (3) Special Rule, hold an Objective worth 1 Victory Point when the Controlling Player scores Victory Points for that Objective, they would score a total of 4 Victory Points.
Furthermore, the value of X is added to the Tactical Strength of the Model that has that Special Rule to determine its ability to Control Objectives (see Core Missions in the Warhammer: The Horus Heresy – Age of Darkness Rulebook).