The Pyrsmosians are the native species of Prysmos. Though they are outwardly identical to the humans, even down to the diverse skin tones, they are set apart by their ability to practice the magical arts.
The Prysmosian worshipped a deity known as Heskedor who, according to legend, created the universe from her own body, with her heart becoming Prysmos.
Long ago, the Prysmosians utilized magic in their daily lives before they developed a highly advanced technological civilization and magic became forgotten. The only survivor of this transition was the wizard Merklynn who, some three hundred years before 2018, caused the Trinary Re-Alignment that disabled all technology on Prysmos and restored magic to its former standing. In this new "Age of Magic", whole generations grew up in contempt of technology, some even disbelieving that their world had once been a technological civilization.
In this new world, Merklynn selected a group of Prysmosians to become his Visionaries, before masterminding an iteration of the group to splinter into the Spectral Knights and Darkling Lords. Unfortunately, Merklynn had been hasty in crafting his spell and the ternary stars drifted out of alignment, the gravitational forces destroying Prysmos. The Prysmosians, once numbering in the millions, were now reduced to around ten to eleven thousand indivudals.
After Merklynn had used the Talisman to create New Prysmos within Cybertron, a handful of Prysmosian refugees came to live in the cramped city. To negotiate with the Council of Worlds, Leoric and Virulina were appointed as representatives of the Prysmosian people. After the latter had killed Kup, the Darkling Lords made plans for a Cybertronian genocide. The senior staff of the Spectral Knights attempted to prevent this but found themselves chased out of New Prysmos by the ordinary Prysmosians citizens. Virulina was then appointed to the post of chancellor.
As a result of Wheeljack's anti-Talisman bomb interacting with Galadria's healing spell, New Prysmos was lifted to the surface of Cybertron with both Prysmosians and Cybertronians deciding to compromise and leave the other species be for the time being.
The Prysmosians remained isolated in their colony until Unicron mounted an attack on Cybertron directly. Windblade appealed to Leoric for aid who managed to use the Talisman's magic to teleport the population to Earth. Upon materializing in Africa, Windblade commented that the Prysmosians themselves hadn't made the trip to Earth before more pressing issues soon garnered her attention.
- Prysmosian at the TFWiki