10 Best Times Superheroes Became Villains

10. Apocalypse's Horsemen - Various

Although Apocalypse has recently rebranded himself as mutant martyr in homo-superior's centuries long struggle against humanity (seriously, what are you doing if you're not reading Powers of X?), the Ancient Egyptian has long been cast as a menacing threat for the X-Men to confront.

En Sabah Nur has been going strong for hundreds of years and during that time has constantly practiced a 'survival of the fittest' mantra, whereby those too weak to survive his rule are deemed expendable. Augmented by Celestial technology, Apocalypse can alter his body at a molecular level and has even been known to restore mutant abilities to those that have lost them. His fascination with evolution has also led him to experiment on and genetically alter certain mutants, adopting them as his own Horsemen in return.

Plenty of X-Men have been turned to Apocalypse's cabal in the past, including Wolverine on a select few occasions. However, while Logan's turn was certainly significant, it wasn't the most famous. That honour belongs to Archangel.

After losing his wings in the Mutant Massacre, Warren Worthington was given a second chance by Apocalypse to get his powers back - so long as he became his servant. Warren then takes on X-Factor with his new metal wings, providing X-fans not only with an iconic betrayal, but a suitably iconic makeover too.