If You Can Read This (Gravity Falls/ Steven Universe Crossover)

Dipper picked up the notebook with a raised eyebrow. It had a symbol in pink pen, one that resembled a gem. Inspecting it further, he opened it warily. Upon this action, his head began thumping hard. He had to put it down before continuing.

At first, it seemed like it was written in scribbles, but, slowly blinking his eyes, he realized it was changing to legible writing. And he read the first sentence in the notebook.

To whomever it concerns,
If you can read this, then you're like me.