Mark of Nurgle

If the unmodified wound roll for an attack made
with a melee weapon for a friendly Slaves to
Darkness Nurgle units wholly within 12" of a
friendly model with this ability is 6, add 1 to the
damage inflicted by that attack. In addition, if
this model is a general, subtract 1 from hit rolls
for attacks made with missile weapons that target
friendly Slaves to Darkness Nurgle units wholly
within 12" of this model.