GIF Triangle shaped stick man one eye with hat flying in sky, Gravity Falls Bill Cypher that evil isosceles “ELOO LV ZDWFKLQJ ” translated into "Bill Is Watching." No joke I did by myself, I have memorized the Ceasar Cipher for this kind of stuff.
If you haven’t yet, you should be reading Payment in Blood by spyroforlife. It has one of the best dark!dippers in my opinion. And the relationship between him, bill and magic in general is spot-on. (read tags though they aren’t kidding about the gore)