4. The Sentinels
They may not have cried, “Destroy All Mutants!” as in the comic books, but the Sentinels from X-Men: Days of Future Past were still very cool. As villains go, the fact that they had little in the way of personality would usually be an issue, but that’s actually something which played in their favour here as these mutant hunting robots were admittedly terrifying both timelines.
While the 70s versions would be easily manipulated by Magneto, it was those targeting the future X-Men which were truly worth fearing as they slaughtered many fan favourite mutants while Wolverine attempted to fix the world by travelling back in time. Fans had been demanding an appearance from the Sentinels for years, and they were done justice here.