Made from sand, I let you see, but one wrong move can shatter me.

HERE COME DOTS If you rearrange the above letters, In a particular way. You will discover a form of communication, That was popular back in the day. What am I?

In the whisper of quills, it flows like rivers of midnight, captured in the dance of feathered scribes, painting stories without uttering a single sound.

I am mandatory. You have to pay me every year, and every time you buy something. Add an I and I also cost you money, but at least you're going places.

The difference between Coke and Mexican Coke is a five letter thing. A sweet, and perhaps deadly, crystalline thing; ground more finely for powdering things.