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Elixirs
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Elixir of Health: This potion cures blindness, deafness, disease, feeblemindedness, insanity, infection, infestation, poisoning, and rot. It will not heal wounds or restore hit points lost through any of the above causes. Imbibing the whole potion will cure all of the above afflictions suffered by the imbiber. Half a flask will cure any one or two of the listed ills (DM's choice). 

Elixir of Madness: A single sip of this elixir causes the imbiber to go mad, as if affected by the 4th-level wizard spell, confusion, until a heal, restoration, or wish spell is used to remove the madness. Once any creature is affected by the elixir, the remaining draught loses all magical properties, becoming merely a foul-tasting liquid. 

Elixir of Youth: Quaffing this rare and potent elixir will reverse aging. Taking the full potion at once reduces the imbiber's age by 1d4 + 1 years. Taking just a sip first, instead of drinking it down, will reduce the potency of the liquid, and drinking the lower-potency liquid reduces age by only 1d3 years.