"fire is plasma"
https://science.nasa.gov/science-news/science-at-nasa/1999/ast07sep99_1/
"Jinn are perceived is as an invisible entity that were created from smokeless fire."
https://mythology.net/mythical-creatures/jinn/
"Such life would exist in a "shadow biosphere." By that, I don't mean a ghost realm, but undiscovered creatures probably with a different biochemistry."
https://www.livescience.com/could-invisible-aliens-exist-here-astrobiology.html