Brutal (Quality)
A brutal weapon gains a +1 weapon bonus to each damage die rolled of the base weapon damage. This +1 bonus to damage cannot cause the damage die to exceed its maximum value. For example, a cruciate mace (d10 base) wielded by a level 15 character deals 3d10 base weapon damage. Because it has the brutal quality, each of the d10's rolled that has a value of 9 or less gets +1 added to it. If a die comes up a natural 10, it does not gain the +1 bonus from brutal, since that would cause it to exceed its maximum die value. Note that brutal has no effect on bonus dice, precision dice, or other non-base weapon damage dice.
If using an average for one or more brutal dice, the brutal quality adds 0.5 to the normal average for the die size. Thus a d10, normally granting a 5.5 average, becomes a 6 average with the brutal quality.