Baharroth

When Baharroth enters play from Deep Strike, all enemy units within 6" must take a test as if hit by a weapon with the Blind special rule. Models that are immune to the Blind special rule are immune to Sun's Brilliance.

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.

If a model with this special rule suffers an unsaved Wound from an attack that inflicts Instant Death, it only reduces its Wounds by 1, instead of automatically reducing its Wounds to 0.

Units containing one or more models with the Fearless special rule automatically pass Pinning, Fear, Regroup tests and Morale checks, but cannot Go to Ground and cannot choose to fail a Morale check due to the Our Weapons Are Useless rule. If a unit has Gone to Ground and then gains the Fearless special rule, all the effects of Go to Ground are immediately cancelled.

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).

A unit that contains at least one model with this special rule that is locked in combat can choose to leave close combat at the end of any Assault phase. If the unit wishes to do so, it must take an Initiative test.

If the test is failed, nothing happens and the models remain locked in the fight.

If the test is passed, choose a direction - then roll 3D6. As long as the distance rolled, in inches, is sufficient to allow the entire unit to move over 1" away from all of the enemy units they are locked in combat with, the unit breaks away from combat and must immediately move a number of inches in the chosen direction equal to the 3D6 result, ignoring the models they were locked in combat with. No Sweeping Advance rolls are made. Enemy units that are no longer locked in combat immediately Consolidate D6".

A Hit & Run move is not slowed by difficult terrain, but takes Dangerous Terrain tests as normal. It may not be used to move into base or hull contact with enemy units, and models instead stop 1" away. If there are units with this rule on both sides who wish to disengage, roll-off to determine who goes first and then alternate disengaging them. If the last of these ends up no longer in combat, it Consolidates instead.

A unit that contains at least one model with this special rule does not scatter when it arrives by Deep Strike.

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.