Nannasprite describes The Medium as "a ring of pure void, dividing light and darkness". The Medium seems to be the main body of the Incipisphere, with a kingdom of darkness outside of it relative to the four main planets and one of light within it. To be completely specific, Hussie defined it as terminating at The Veil. It should be noted that the trolls' planets were destroyed, one after the other, by Jack Noir and that they also lost their Prospit and Derse.