15 Greatest Marvel Comic Book Villains Of All Time

13. Phoenix

Jean Grey is one of the Marvel Universe's greatest heroes, but when her immense psychic abilities led to her being bonded with the Phoenix Force, destruction followed. After obliterating an entire planet, the out of control Jean was ultimately forced to take her own life to stop this cosmic power, but it's come back to haunt the X-Men many times since.

For example, when the Phoenix Force recently returned to Earth, it led to a massive conflict between the Avengers and X-Men which left the latter superhero team fractured for good after Cyclops, Emma Frost, Namor, Colossus, and Magik were imbued with its power and attempted to take over the planet. The point is, regardless of the host, the Phoenix is one of the most deadly entities in the Marvel Universe!