The Polypollex Curse causes all the victim’s digits to become thumbs. This radically decreases the victim’s manual Body when using its hands, resulting in a most Body Skill checks and Contesting Rolls, as well as any actions not based on Body but in which the hands are required to execute the skill successfully – for example, using the Influence skill to play an instrument or the Endurance or Balance Skill Roll to climb a wall.

If the Target is a spellcaster, it must make a DC 10 check each time it casts a Spell with a somatic component; if this check fails, the Spell is ruined and has no effect.

The Polypollex Curse is considered a Polymorph effect and can be negated with Dispel Magic or Wish Fulfillment. If the victim uses a Polymorph effect to assume a different shape, the effects of the polypollex Curse are suppressed for the duration of that effect.