A group of animated characters, including Dipper and Mabel Pines, gather around a birthday cake with lit candles shaped like the number 13, while a character in a party hat stands beside it; the scene cuts to a man with a beard and glasses, wearing a jacket, standing with arms outstretched against a backdrop of a glowing galaxy, then to a character with a long neck and blue feathers standing on a platform in a dark, cavernous environment, followed by a glowing blue symbol of a pyramid with an eye and a bowtie, then to a large man with a hat and glasses, looking distressed, and finally to a man