Prepare a rimming plate with coarse salt or sugar and set aside. Cut a lime into wedges for garnishing and rimming the glass.
Fill a cocktail shaker with ice, then pour in the tequila, fresh lime juice, simple syrup, and add a pinch of activated charcoal powder.
Secure the lid and shake vigorously for about 15 seconds until the mixture is well chilled and the charcoal is evenly dispersed, giving the drink a glossy black appearance.
Moisten the rim of your serving glass with a lime wedge and dip it into the rimming plate to coat evenly with salt or sugar.
Strain the cocktail through the strainer into the prepared glass, avoiding ice chunks and ensuring a smooth, opaque black pour.
Garnish the drink with a fresh lime wedge on the rim for a vibrant contrast against the dark liquid.
This striking Black Magic Margarita is now ready to enjoy, displaying a sleek, jet-black color with a shimmering surface and a tangy aroma.