You have an innate ability in a skill that defies normal expectations.  Choose a skill whose key ability score is less than 10.

Prerequisite: none.

Benefit: Subtract any ability score bonus or penalty from this skill rating instead of adding it.  This means that a negative ability score bonus improves this skill while a positive bonus impedes it.

Normal: Ability score bonuses are added to your skill rating.

Special: Note that an ability score may never be reduced below 1 without killing or knocking out the character, so the lowest ability score penalty possible is -5.