Prepare the eyeball garnish - Take the lychee fruits and cut them in half, removing the pit. Stuff a blueberry into the hollow center of each lychee half, creating an eerie eyeball. Set aside. - For an even spookier effect, you can use a small food-safe marker to draw veins or bloodshot patterns on the lychee fruit before stuffing them with blueberries.

Muddle the mixed berries - Place the mixed berries in a cocktail shaker and muddle them gently to release their juices. If you prefer a smoother texture, you can strain the muddled berries to remove any seeds or pulp. - If you don't have a muddler, you can use the back of a spoon or a wooden muddle-like tool to gently crush the berries.

Add the lychee fruit - Add the lychee fruit to the cocktail shaker with the muddled berries. -

Pour in the vodka - Measure and pour the vodka into the cocktail shaker. - If you prefer a non-alcoholic version, you can omit the vodka and replace it with sparkling water or a fruit juice of your choice.

Sweeten with simple syrup - Measure and add the simple syrup to the cocktail shaker. - Adjust the amount of simple syrup to taste. If you prefer a less sweet elixir, reduce the amount of simple syrup or omit it entirely.

Squeeze in lime juice - Cut a lime in half and squeeze fresh lime juice into the cocktail shaker. - For an extra pop of citrus flavor, you can add a few lime slices to the cocktail shaker and muddle them along with the mixed berries.

Shake and strain - Close the cocktail shaker and shake vigorously to combine all the ingredients. Strain the mixture into martini glasses or serving glasses. - If you don't have a cocktail shaker, you can use a large mason jar with a tight-fitting lid. Just make sure to strain the mixture into the glasses to remove any pulp or seeds.

Garnish and serve - Place one of the prepared lychee eyeballs on the rim of each glass as a spooky garnish. Optionally, you can add a few ice cubes to the glass before pouring the elixir. Serve the Lychee Berry Eyeball Elixir immediately and enjoy! - If you want to go the extra mile, you can serve the elixir in dry ice for a smoky effect. Just be sure to handle the dry ice with gloves and follow safety precautions.