Damage - Severance

Roll Under with 2 Dice: Weapon Severance Rating + Bonus to Sever

One VERY optional rule is the use of severance.  As the name implies, it involves cutting off portions of victims.  While this is a powerfully descriptive tool for exciting role-playing, it has some rather tricky complications that must be carefully dealt with.  Referees are encouraged to use this rule with caution.

As the formula at the top implies, the attacker rolls two dice (2D6) and attempts to roll UNDER the combined total of the Weapon Severance Rating PLUS their Bonus to Sever.  Rolling equal is usually considered to be a gouge deep enough to disable the affected portion, though not actually removing it completely from the whole.

Placement
As you would imagine, WHERE the hit lands has some important ramifications.
 
Vitals (1) Well, if you chop off the vitals, the being is really dead.  Really dead.  For this reason, we usually only allow a vital severance to be successful if the damage inflicted is at least 1/3 of the victim's total stamina.  This means that even if they succeed according to the formula above, the head still doesn't come off if they don't do enough damage.  In this case, where they don't inflict enough damage to succeed, then the referee should make the hit extra effective in some other way - be it extra damage, stunning the victim, or just looking really cool.
Chest (2) and
Belly (3)
Again, to sever either the chest or the abdomen means the victim is dead - cut in half, for most bipeds.  So we also make this extremely difficult to achieve: the hit must inflict 1/2 the victim's total stamina.  See above for consoling characters that succeed according to the main formula, but don't make the damage requirement for severing the chest or abdomen.
Arm (4) When an arm is successfully severed, the victim loses some manipulating capability.  The amount of the limb lost is proportional to the amount of damage done.  If 1/3 of the victim's total stamina is inflicted, the whole arm is gone from the shoulder (or whatever) down.  If part of the arm remains, it is at the referee's discretion if the victim can still use the stump for anything.
Leg (5) When a leg is successfully severed, the victim loses mobility.  A hit inflicting 1/2 the victim's total stamina removes the entire limb at the hip, while a half that (1/4 total) will be from the knee down, and so on.  (Yeah, we know, pretty gruesome.)  Referee's should restrict a severed-leg victim's movement.  Their normal movement should be reduced (usually equal to speed), and any dice put into movement should be less effective.  Beings with both legs severed probably should have severe difficulty moving at all (pardon the pun).