The Spiritum Sanguis

A model attacking with this weapon never receives +1 Attack for fighting with two Melee weapons (see page 177).

Weapons with the Master-crafted special rule allow the bearer to re-roll one failed roll To Hit per turn with that weapon.

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).