A <abbr title='A tainted creature gains a permanent and cumulative -1 penalty on their proficiency bonus. If the penalty would bring a creature to a proficiency bonus of +0, the creature dies. A single -1 penalty of the tainted condition can be removed by the Greater Restoration spell or similar healing magic.'>tainted</abbr> creature gains a permanent and cumulative -1 penalty on their proficiency bonus. If the penalty would bring a creature to a proficiency bonus of +0, the creature dies. A single -1 penalty of the tainted condition can be removed by the Greater Restoration spell or similar healing magic.