Bluestream cannot accomplish inherently magical ongoing effects. Examples: If you build something, it has to stay up with physics and not magic. Shields only last as long as the shielder's concentration and continued existence in a friendly section of stream.

The book speculates wildly on how bluestream would behave if it didn't have a planet underneath it to anchor to. The bluestream thins out as you ascend above the thickest part of the atmosphere, and anything one makes starts degrading faster as well. This is why most cities are at low altitude.

The last chapter details the basics of a system for how to mark down and read basic arrangements of bluestream (it includes an example map: a firepit that you can light yourself, or just keep it burning with magic) and mentions that more detail can be found in most intermediate textbooks.