Potion of Longevity

•When you drink this potion, your physical age is
reduced by 1 d6 + 6 years, to a minimum of 13 years.
•Each time you subsequently drink a potion of longevity, there is a 10 percent cumulative chance
that you instead age by 1 d6 + 6 years.
•Suspended in this amber liquid are a scorpion's tail,
an adder's fang, a dead spider, and a tiny heart that, against all reason, is still beating. These ingredients
vanish when the potion is opened.