Buy San Dimas Mezcal Online. The story goes, that one day after the Spaniards arrived to Oaxaca a monk had a dream. In the dream a saint came down from the sky and told the monk to make a distilled spirit from the agave juice. The monk was a true believer in San Dimas, the first saint, and prepared the drink that we know today as mezcal. That is how San Dimas Mezcal was born.