CASSANDRA NOVA
Delighting in cruelty and chaos, Cassandra Nova became one of the X-Men's deadliest villains in her first outing. Since then, this psychic parasite—who built herself a body using Charles Xavier's genes—has devastated the Shi'ar Empire, created microscopic Sentinels, and pushed Earth to the brink of all-out war. Discover more about this immensely powerful, dangerous villain here!
Charles Xavier's Worst Nightmare Made Flesh
Debut
In New X-Men (2001) #114
After growing a body over the course of decades, Cassandra Nova debuts with immense telepathic power and a major grudge against Charles Xavier, her genetic twin.
The Genosha Massacre
In New X-Men (2001) #115
In her very first attack on the Marvel Universe, Cassandra Nova unleashes Wild Sentinels on Genosha, killing 16 million mutants and traumatizing such characters as Emma Frost.
Origin
In New X-Men (2001) #121
Cassandra Nova's origin revealed! Learn how this Mummudrai—a psychic parasite from Shi'ar mythology that acts as a person's dark reflection—came to be.
Return
In Astonishing X-Men (2004) #12
Following her defeat, Cassandra Nova lashes out by manipulating Emma Frost into attacking the X-Men with a new psychic manifestation of the Hellfire Club.
Vs. Jean Grey and the X-Men
In X-Men: Red (2018) #1
After escaping her mental prison, Cassandra Nova targets Jean Grey and her band of X-Men by creating Sentinites, a new wave of Nano-Sentinels that caused anyone infected to lash out violently at mutants.
Member of Kate Pryde's Marauders
In Marauders (2022) #1
Cassandra Nova accepts Krakoa's offer of amnesty, only to join Kate Pryde and Emma Frost's band of Marauders—but even she might not be ready for what they have planned.