Since 2022, Coca-Cola Company’s Fanta has released mystery flavors with clues while inviting consumers to share their guesses as a part of its “What The Fanta?” ongoing promotional campaign. This Halloween, however, Fanta’s latest undisclosed concoction has a holiday twist.

Unlike most of Fanta’s colorful sodas, the latest “What The Fanta?” is a spooky black with a monochromatic label that features a Halloween theme and faint green color. A cobweb hangs attached to the side of the “What the Fanta?” logo while a spider dangles down the center and a bat flies in front of a full moon. A QR code on the label sends folks to a Halloween-themed world with games, flavor clues, and chances to win prizes like movie tickets.

The dark brew also turns tongues black, adding a little silliness to the newest flavor. The color change is only temporary and adds an experiential component to the campaign.