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The team’s villains have often reached rarefied levels of popularity, outdoing heroes that existed decades longer than them. They are some of the most deadly villains out there, but there are some who make the others look like angry toddlers, formidable enemies that are near unstoppable. These ten X-Men villains are the most dangerous of the bunch, ranked by just how deadly they are.
10) Mystique
Mystique is an X-Men great, and way more dangerous (and important) than she seems. There was a time in the ’80s when she was the team’s main enemy, her shapeshifting powers and decades of experience making her extremely dangerous, and her cronies in the Brotherhood of Evil Mutants backing her up. However, even without anyone, she’s able to thrash just about anyone in front of her. She’s one of the greatest spies and assassins of the modern era, a master of death and mayhem like few others. She may not be some all-powerful bruiser, but she can get close enough to hurt anyone. She’s deadly, even when she’s barely trying.
9) Omega Red
Omega Red is mostly thought of as a Wolverine villain, but he’s also battled the X-Men numerous times over the decades. His first appearance was a battle against the group, and his death factor allowed him to take out the entire Blue Team. Red’s powers make him release an aura that is basically like every disease you can imagine infecting you at once. Only people with healing factors are immune to it, and the worse Omega Red makes people feel, the stronger he gets. Red doesn’t get the credit for just how dangerous he really is.
8) Sabretooth
Sabretooth is the worst of the worst, one of the great killers of the Marvel Universe. He’s basically everything Wolverine could be if he didn’t care about anything but himself, and he’s proven how scary a prospect that is. He’s fast, he’s strong, and, most importantly, he’s cunning. He may seem like a bloodthirsty berserker, but there’s more going on in his head than most people realize and he’s a master manipulator and strategist. His healing factor means he can take tremendous damage, making an already great threat even harder to beat.
7) The Brood
The Brood were Marvel’s answer to the Xenomorphs, and one of the greatest predators in the universe. They’re a nearly unstoppable tide of monsters, planting their eggs in victims, and devouring everything else. The X-Men have had to figure out ways to stop thousands of the hive-minded beasties many times, and have been able to keep the monsters from the Earth, often by the skin of their teeth. Even the most technologically advanced races can fall to a Brood invasion, so the X-Men beating them shows how resourceful the group can be.
6) Mastermind
The Brotherhood of Evil Mutants is an impressive group, with some of the most potent mutant villains ever in their ranks. One of the most underrated is Mastermind. Jason Macendale can control the minds of just about anyone, and was even able to manipulate the mind of the Phoenix. Jason can beat the defenses of even the most powerful telepaths and fool anyone, making them do whatever he wants. He’s the kind of villain who can be a real danger if anyone ever tried to make him one, his depravity making his powers even more dangerous.
