Make the blueberry syrup: In a small saucepan, combine wild blueberries, sugar, and water. Bring to a boil, simmer 5 minutes until reduced. Cool, strain for clarity, discarding skins.

Make the lime syrup: In another small saucepan, combine Key lime juice, sugar, and water. Bring to a simmer, stirring until sugar is dissolved. Cool completely.

Set the scene for the pooling visual effect. Lay a faceted glass on a clean surface. Scatter fresh, huge blueberries and lime slices around. Add ice and generous amounts of huge blueberries and lime slices inside the glass. pooling liquid logic: ensure the glass surface is clean so liquids will pool on plate edges and around food creating a mirror reflection, and condensation dripping down sides in thick glossy ribbons.

Build the vortex of flavor: Into the glass, carefully pour 1 oz of blueberry syrup and 1 oz of lime syrup, floating the latter to create distinct bands. Add 2 oz of gin directly over the ice.

The final visual indulgence (The Slow Pour): Top with 4 oz club soda, pouring in a single, slow, steady stream. Give a final quick stir with the small silver cocktail spoon to enhance the swirling effect, making every surface wet and glistening and creating that oil slick shine effect. ensure the liquids pool creating a mirror reflection logic is followed. Serve immediately, with fresh lemon wedges on the side for guests who want extra tartness. lemon wedges on the side logic followed.