Psycho-Prism

The Psycho-Prism is a rage-inducing object from the Generation 1 continuity family.

It looks pretty, and it will send you on a violent rampage. Neato!

The Psycho-Prism is a gem-shaped object developed by Doctor Doom with the intention of mind control, but is only at the level of causing a blood-curling rage wave.

Fiction

IDW Comics continuity

The New Avengers/The Transformers

The Psycho-Prism was stolen from Doctor Doom by the Decepticons so they could instigate war between Latveria and Symkaria. Doctor Doom and Ratchet were able to construct counterdefenses against the Psycho-Prism's aggression wave.

Unwilling to give Ramjet Spider-Man's Energon goodies, Megatron ordered him to guard the Psycho-Prism. Man and Machine, Part Two

Trivia

• The Psycho-Prism hasn't just been cooked up for this crossover, with a more fully-functional version having been previously employed by the good doctor in Marvel's 1987 Avengers graphic novel, "Emperor Doom." And now you know!
  
  
  From Teletraan I: The Transformers Wiki, a Wikia wiki.