The Dragon's Heart cocktail was created by New York City mixologist Ektoras Binikos of Art & Spirit Mixology for Ron Abuelo Rum. The occasion was the date 12/12/12, a supposedly extra-lucky day because 2012 fell in the lunar Year of the Dragon. To celebrate, Ron Abuelo had 12 mixologists create 12 cocktails using their 12-year-old rum. This one, with its combination of rum, mezcal, and blood orange, happens to be a wonderful drink for the winter months.
There's a lot going on in this cocktail and you can decide how deep the flavor actually goes. Either mix up an elderflower cordial or a housemade mint-citrus syrup, which will give the drink different flavor profiles. As yet another option, if you do not have or cannot find an elderflower cordial, St. Germain liqueur is a fine substitute and a bottle that is very handy to have in the bar anyway.