#8: Wolverine (Uncanny X-Men #142)
While Days of Future Past is more of an alternate future than a real story, it is still a classic among comic fans. One of the most shocking moments of the book is when Wolverine’s decision to take down a Sentinel by himself is met with mixed results. And by mixed we mean that he gets fried down until only his adamantium remains in tact. Wolverine’s death was an unsettling glimpse into a possible dark future for the X-Men. Oh, Colossus and Storm also died in that issue but no one cares to remember that.