Black Guardian War Walkers

A model with this special rule has the Hatred special rule against Daemons of Slaanesh or models with the Mark of Slaanesh. Furthermore, when making Fear tests, a unit containing at least one model with this special rule suffers a -1 penalty to its Leadership if it is engaged in combat with a unit that contains at least one model with the Mark of Slaanesh or the Daemon of Slaanesh special rule.

A unit comprised entirely of models with the Battle Focus special rule can either shoot and then Run, or Run and then shoot, in the same Shooting phase. The unit must complete both actions before you move onto the next unit - otherwise the chance to make the second action is forfeit.

A model cannot Run if it fired a Heavy weapon during the same Shooting phase unless it has the Relentless special rule. Similarly, a model that has Run cannot then fire a Heavy weapon in the same Shooting phase unless it has the Relentless special rule. Models that cannot Run gain no benefit from the Battle Focus special rule.

A unit composed entirely of models with this special rule can re-roll one or more of the dice when determining Run moves and charge ranges (such as a single D6 from a charge range roll, for example).

After both sides have deployed (including Infiltrators), but before the first player begins his first turn, a unit containing at least one model with this special rule can choose to redeploy. If the unit is Infantry, Artillery, a Walker or a Monstrous Creature, each model can redeploy anywhere entirely within 6" of its current position. If it is any other unit type, each model can instead
redeploy anywhere entirely within 12" of its current position. During this redeployment, Scouts can move outside the owning player's deployment zone, but must remain more than 12" away from any enemy unit. A unit that makes a Scout redeployment cannot charge in the first game turn. A unit cannot embark or disembark as part of a Scout redeployment. 

If both sides have Scouts, roll-off; the winner decides who redeploys first. Then alternate redeploying Scout units.

If a unit with this special rule is deployed inside a Dedicated Transport, it confers the Scout special rule to the Transport (though a disembarkation cannot be performed as part of the redeployment). Note that a Transport with this special rule does not lose it if a unit without this special rule is embarked upon it. Having Scout also confers the Outflank special rule to units of Scouts that are kept as Reserves.

If a unit has both the Infiltrate and Scout special rule, that unit can deploy as per the Infiltrate special rule and then redeploy as per the Scout special rule.