An Ice Warrior was a prisoner of the Selachians on Ockora in 2204. Zoe Heriot, who also a prisoner, tried to avoid it, but it most of its time morosely contemplating its own situation. It died when the planet was destroyed by the G-bomb. (PROSE: The Final Sanction)
Behind the scenes[]
The Final Sanction also makes reference to the Selachians using a sun-stoker during an attack on a Martian colony, but it is not made clear whether this was the event in which this Ice Warrior was captured.