Kobold’s Paw

(requires attunement) - 40 gp
  The dessicated hand of a kobold, cut off at the wrist. Its four fingers are extended upward and fixed in position by rigor mortis. Whenever you make a skill check, you may invoke the kobold’s paw to gain advantage on the roll. You can invoke the kobold’s paw after seeing the roll but before knowing if it succeeds or fails. Once you do so, the GM can force disadvantage on one other skill check, saving throw, or attack you make. You cannot invoke the kobold’s paw to gain advantage again until you have been forced to roll at disadvantage. Once you make your roll at disadvantage, one finger on the kobold’s paw curls down. Once the four fingers on the kobold’s paw curl to form a fist, it cannot be used again