Xavier's vast psionic powers enable him to manipulate the minds of others, warp perceptions to make himself seem invisible, project mental illusions, cause loss of particular memories or total amnesia, and induce pain or temporary mental and/or physical paralysis in others. Within close range, he can manipulate almost any number of minds for such simple feats. However, he can only take full possession of one other mind at a time, and must strictly be within that person's physical presence. He is one of the few telepaths skilled enough to communicate with animals and even share their perceptions. He can also telepathically take away or control people's natural bodily functions and senses, such as sight, hearing, smell, taste, or even mutant powers. A side effect of his telepathy is that he has an eidetic memory and his brain can assimilate and process impossibly huge amounts of raw data in an astonishingly short amount of time. He has displayed telepathic prowess sufficient to confront Ego the Living Planet (while aided by Cadre K) as well as narrowly defeat Exodus. However, he cannot permanently "reprogram" human minds to believe what he might want them to believe even if he wanted to do so, explaining that the mind is an organism that would always recall the steps necessary for it to reach the present and thus 'rewrite' itself to its original setting if he tried to change it. However, his initial reprogramming of Wolverine lasted several years, despite Wolverine overcoming the reprogramming much faster than an ordinary human because of his healing factor.