"Shadow Xavier" is the semi-official name of an alternate-version of Xavier who appeared in New Excalibur as the leader of a corrupted group of extra-dimensional X-Men known as the Shadow X-Men, he was actually a pawn of the Shadow King - who had possessed him and was using his formidable powers to cause havoc both in his native realm and others: he was defeated physically by Pete Wisdom (who sneaked up behind him and delivered several "hot-knives" to his skull) - however he continued to torment the group from the psychic realm until he was defeated once again.