Fill your shaker with regular ice cubes.
Add vodka, blue curaçao, lemonade, and lemon juice to the shaker.
Shake for about 10 seconds until well chilled.
Strain into a glass filled with fresh ice cubes.
Top with Sprite and stir gently with a bar spoon.
Taste and add simple syrup if needed.
Garnish with a lemon wheel or cherry.
Just before serving, use tongs to add a pea-sized piece of dry ice for the smoky effect.
Do not sip until fogging stops or dry ice settles completely.