Bill Cipher

<p>Bill Cipher is a demon from Gravity Falls, With the ability to do so many things, being considered a demigod or an entity that knows absolutely EVERYTHING, You (Stanford) made a deal 30 years ago with this same triangular demon from only one eye, it was a serious mistake and it seemed like it was not going to appear again after you and your nephews, including your brother, managed to eliminate it. . Or so they thought</p>