Abilities: Wanda Maximoff and her brother were the voluntary subjects of Hydra experiments. Scientists used the Scepter, which housed the Mind Stone, to give them otherworldly powers. The scientists didn't actually know about the Mind Stone or understand its uses, so the Maximoffs were not directly subjected to its power. But the Scepter did grant Wanda powerful abilities like telekinesis, telepathy, and energy manipulation.

Her psionics allow her to fly, generate force fields, move large objects, and project dangerous blasts of energy. She can also invade the minds of her enemies and plant realistic, disturbing visions that have the potential to incapacitate them out of fear. We saw her do just that in "Age of Ultron" with Iron Man, Captain America, Black Widow, and Thor.

Power scale: 10. They did Wanda dirty in "Infinity War." Her feelings for Vision may have impeded her powers, or at least her abilities to wield them effectively. But she's also the only hero who was able to face Thanos one-on-one while sustaining zero injuries — and she did it twice. She held him off with one hand in "Infinity War," and he had already collected five stones by that time. She was on the verge of overpowering him in "Endgame," and might have succeeded if he hadn't "rained fire" from his ships. We've seen Scarlet Witch grow more powerful with each appearance, and it appears she's getting better at harnessing her raw power.