Bill Cipher is the triangular dream demon and main antagonist of Disney's animated series Gravity Falls, which aired from 2012 to 2016. Known for his chaotic humour and reality-bending schemes, he became one of the show's most quotable characters, and short clips of his voice lines circulate widely in fan edits and memes. This arrival line is popular because it captures his showmanship in just a few seconds, making it an easy shorthand for a villain stepping into a scene or a creator making a long-awaited comeback.