Psi-Scream

The Psi-Scream is a fictional weapon featured in comic books published by Marvel Comics. It first appeared in Uncanny X-Men #155 in 1982.

Description & History
The Psi-Scream is a weaponized psionic device utilized by the savage alien race known as the Brood. It is capable of altering the perceptions of it's intended target. It draws out one's deepest fears and hatreds and amplifies them, causing them to see images of these things in others. It's effects are so powerful that it can cause individuals to aggressively attack it's closest allies.

The Brood Skür'kll used such a device to force the mutant superhero Storm and the space adventurer Corsair to fight one another. Fortunately, Professor Charles Xavier was able to use his own mutant powers to cancel out the effects, returning Storm and Corsair to normal.