Phystal is a character appearing the story Swords of Mars.
Phystal is an inhabitant of Zodanga. He works for the inventor Fal Sivas and is in charge of the slaves in Sivas' house. When John Carter and Zanda try to steal Fal Sivas' ship, Phystal confronts them along with Hamas, Wolak and Fal Sivas. Wolak is easily killed by Carter and Zanda takes down Fal Sivas, after which Hamas and Phystal surrender. Carter binds and gags them and leaves them behind. Phystal is not seen again afterwards.