Typhus

Once per game in any assault phase Typhus can use the hive instead of attacking. 
At the start of Typhus's initiative step, place a Large Blast marker over Typhus (doesn't scatter). 
All units suffer a number of hits equal to the number of models from their unit that are at least partially covered by the template.
These hits are S4 AP2 and Ignores Cover. This attack does not affect Typhus.

A Model with this rule must issue and accept challenges. Where there are multiple models with this rule, the controlling player may decide.
Whenever a model with this rule kills a character, roll a D66 and consult the Chaos Boon chart. This boon remains for the rest of the game.

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.

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.

Models with this rule have +1 Ld and Hatred (Space Marines)
This Hatred applies for the following books:
Codex: Space Marines
Codex: Dark Angels
Codex: Space Wolves
Codex: Blood Angels
Codex: Grey Knights

When a model with this special rule suffers an unsaved Wound, it can make a special Feel No Pain roll to avoid being wounded (this is not a saving throw and so can be used against attacks that state that 'no saves of any kind are allowed', for example those inflicted by Perils of the Warp).

Feel No Pain saves may not be taken against Destroyer attacks or against unsaved Wounds that have the Instant Death special rule.

Roll a D6 each time an unsaved Wound is suffered. On a 4 or less, you must take the Wound as normal. On a 5+, the unsaved  Wound is discounted - treat it as having been saved.

If a unit has the Feel No Pain special rule with a number in brackets afterwards -Feel No Pain (6+), for example - then the number in brackets is the D6 result needed to discount the Wound.

Makes Plague Zombies.

+1 Toughness