The Archemax was a phraxship named after an ancient Sanctaphrax academic. It was used by a group of descenders during the events of The Immortals. The ship crash landed when it was returning to Hive and was repaired by Cirrus Gladehawk, Weelum, and Squall Razortooth.
Nate Quarter, Slip, Eudoxia Prade, Weelum, Ambris Hentadile, Galston Prade, Cirrus Gladehawk, and Squall Razortooth journeyed to the Edge in the Archemax to search for the Ambris's brother who had descended the Edge Cliff. But instead, the ship was used against the Gloamglozers on the returned Sanctaphrax Rock.