Shred If a model has the Shred special rule, or is attacking with a Melee weapon that has the Shred rule, it re-rolls failed To Wound rolls in close combat.
Similarly, if a model makes a Shooting Attack with a weapon that has the Shred rule, it re-rolls its failed To Wound rolls.
Reaping Blow (X) If a model is in base contact with more than one enemy model in the Initiative step in which they fight, they gain a number of Attacks equal to the value of X as noted in the variant of the special rule (if no value of X is included then count the value of X as 1).