The X-Men have had more deaths than just about any superteam in history. It has actually reached the point where most people are not surprised when someone dies, and the deaths never mean anything anymore. In today’s Marvel Universe, X-Men die all the time and have a resurrection protocol to bring them back.
However, in the early years of X-Men comics, there were deaths that shocked readers and left the team members heartbroken. There were also some deaths in more recent years that were shocking enough to stun fans and leave them mourning the loss of a mutant favorite.
The idea of Cypher dying in New Mutants #60 by Louise Simonson and Bret Blevins was not something that broke the readers’ hearts. The truth is that Douglas Ramsey was poorly written and built.
No one cared about him, and it was the equivalent of Jason Todd dying in Batman comics. However, this was a death that devastated his teammates, with Dani Moonstar and Illyana Rasputin heartbroken and Warlock shattered.
What lessens the impact of Cyclops’ death in the Inhumans vs. X-Men event series is that he was a martyr for too long and had proven to be a less than heroic character.
There was an event where a cloud of Terrigen Mists spread over the Earth, which was fatal to mutants. Cyclops fell quickly to the Terrigen Mists and died. However, what made this even more heartbreaking was that Emma Frost hid his death and created an illusion of a still-alive Cyclops, who Black Bolt “killed.”
Out of all the New Mutants members, Rahne Sinclair was the one with the most inner trauma. That made her death not only heartbreaking but truly infuriating when looking at the rampant racism in the world toward mutants. The death was shown in Uncanny X-Men Vol. 5 #17 by Matthew Rosenberg and Carlos Gomez.
Wolfsbane had quit the X-Men and was sitting alone in a park. When some guys came up and started to hit on her, she asked to be left alone. They started to abuse her physically, and when she showed she was a mutant, they beat her to death. Wolverine skipped her funeral to get revenge.