The exact details of his recruitment by Mister Sinister to the mercenary group known as the Marauders are unknown, Prism has the ability to absorb, reflect, and amplify beams of light and other energy with his crystalline body. Prism first appeared as part of a "search and destroy" mini-team of Marauders, consisting of himself, Arclight and Scrambler, that were sent to eliminate the members of X-Factor, who were leading an evacuation mission to help Morlocks escape the Marauders.
After using his powers to reflect Cyclops's optic blast back at him, X-Factor member Jean Grey used her telekinetic powers to slam Prism against a nearby wall. Much to everyone's surprise, the move killed Prism as his body was ultimately too fragile to survive being slammed against the wall.
Prism, along with those fellow Marauders that also did not survive the Mutant Massacre, was ultimately resurrected by Mr. Sinister using his cloning technology. However, Prism's lifespan was once again cut short when he was killed by a group of demonized police officers during the opening hours of the Inferno, during a rematch between the Marauders and the X-Men .
Prism is a member of the 198 Mutants left after M-Day, where he was institutionalized in a mental hospital, where he rose to power and exacted revenge on those who harassed him and lost their powers.
Alongside the other Marauders, Prism ambushed the X-Men at Mystique's residence, and participated in the ensuing battle. The Marauders quickly defeated the X-Men and kidnapped Rogue, returning to Mr. Sinister. It has also been revealed that Prism, with several of his teammates, assassinated the Dark Mother, who claimed to be an ancestor of Jean Grey.
Prism was created by Louise Jones Simonson and Walter Simonson in 1986 and first appeared in X-Factor # 10.
Prism had a crystal-like body that was able to reflect and amplify energy attacks, but making him vulnerable to physical attacks.