Darkstrider

Can only join Breacher Teams, Strike Teams or Pathfinder Teams.

Darkstrider, and his unit, can consolidate D6 in any direction after firing Overwatch (before rolls for charge range are made).

During deployment, players can declare that any unit that contains at least one model with this special rule is attempting to Outflank the enemy. This means they are making a wide sweeping move to get behind enemy lines or come at the foe from an unexpected direction.

When an Outflanking unit arrives from Reserves, but not Ongoing Reserve, the controlling player rolls a D6: on a 1-2, the unit comes in from the table edge to the left of their controlling player's own table edge; on a 3-4, they come on from the right; on a 5-6, the player can choose left or right. Models move onto the table as described for other Reserves. If such a unit deploys inside a Dedicated Transport, they may Outflank along with their Transport.

When an enemy unit declares a charge, all friendly models with this special rule in units within 6" of the charging unit's target can choose to fire Overwatch as if they were also targets of the charge. Note that a unit can still only fire Overwatch once each phase.

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.

Independent characters can join other units.  They cannot, however, join units that contain vehicles or Monstrous Creatures.  They can join other Independent Characters, though, to form a powerful multi-character unit!  Independent Characters pass Look Out, Sir rolls on a 2+. A unit that contains one or more Independent Characters does not need a double 1 to Regroup if reduced to below 25% of its starting numbres, but instead tests as if it had at least 25% remaining.

Full details in BRB. Rule too long to copy verbatim.