Ask HN: What does plasma propulsion engine fuel look like?

you need gas plasma, and electric current and a lot of techknowhow

https://en.wikipedia.org/wiki/Plasma_propulsion_engine

https://en.wikipedia.org/wiki/Variable_Specific_Impulse_Magn...

https://en.wikipedia.org/wiki/Plasma_(physics)

at this point in the game it looks like a cylinder of compressed gas