The ability to alter (or remotely observe) reality, directly tied to the mind/brain of the character. This is a specific form of Magic by Any Other Name, where the magic is named for some pseudoscientific relationship with the caster's mental powers. Psychic, psion, mentalic, mentalist, parapsychologist: there are dozens of names for these people whose minds are able to sense and/or manipulate reality on a level that has yet to be proven to exist in Real Life.