Scarlet Witch

All by herself, she managed to instill fear in the entire Avengers team (including the Hulk and Thor). By the end of Age of Ultron, she shows that she is one of the heavy-hitters of the entire MCU, fully stopping a speeding train and even ripping Ultron’s heart (?!?) out. She is a total badass.

And the best thing is that she is still evolving. In Age of Ultron, even if she displayed tremendous amounts of power, she was still a novice – in the Civil War trailers we saw her flying and even making Vision kneel in front of her.

And, by all definitions, Vision is a god among mortals.

Who knows what the full extent of her powers is? Hopefully, we will see after the Civil War, and well into the Infinity War after that.