Prepare the glasses. Pour the corn syrup and black sugar onto separate small plates. Lightly dip the glasses in the corn syrup, then the sugar. Don't let too much syrup get on the rim, or it will drip down. Fill the glasses halfway with ice.
Mix the cocktail ingredients. Add the vodka, black raspberry, cranberry juice, and Sprite in a cocktail shaker filled with ice and shake well. Pour into the glass.
Garnish. Add a plastic spider and mint for garnish, if you'd like.
Notes
This recipe makes one drink. To make multiples, adjust the serving size using the slider at the bottom of the recipe.