badge mercenary

[gass]

A warm wave of magic flows through your hands as you perceive that..
.. this object, a badge of the mercenary, is trash,
   and can be referred to as 'badge mercenary'.
It is of 1st level, weighs 0 pounds, and is worth 30 gold.
You can wear it around your neck.
When worn, it
   modifies damage roll by 1
   modifies armor class by -17
   modifies hit roll by 1
   modifies will save by 1
   modifies armor class by -5 <--- some saves or resist may be?