Effects: When imbibed this mutagenic potion adds one Silver Talent, which can be used to acquire enhancements.

Preparation: The potion is made by mixing a Trace of the Beyond with ingredients providing one measure of vitriol and two of measures of rebis; a base consisting of strong, high quality alcohol is also required.

Duration: Instantaneous

Toxicity: None

Witchers are capable of extracting components even from the carcasses of unique creatures. This potion formula requires the iridescent mark of the mythical Hellhound, known also as the Beast. The resulting beverage causes further mutation in the witcher's body.