Harald Deathwolf, Lord of the Wolfkin

If a unit contains at least one model with this special rule, and that unit is charged, every model with the Counter-attack special rule in the unit gets +1 Attack until the end of the phase.

If, when charged, the unit was already locked in combat, the Counter-attack special rule has no effect.

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.

If a unit contains at least one model with this special rule, and that unit arrives on a random table edge (due to Outflank, or other special rules), then you can re-roll to see which table edge they arrive from.

A unit that contains at least one model with this special rule automatically passes Fear and Regroup tests. When it Regroups, the unit does not make the 3" Regroup move, but can instead move, shoot (or Run) and declare charges normally in that turn. Furthermore, if a unit containing one or more models with this special rule is caught by a Sweeping Advance, they are not destroyed, but remain locked in combat instead.

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.

All friendly Space Wolves Cavalry and Beasts models that are within 12" of Harald Deathwolf use his Leadership value, unless their own is higher.