Planewalker

Aka. Plane Riders are those who spend their lives traversing the planes and going through the multiverse.

Some study it like wizards focused on this path and others have a more natural ability to do so.

Very little is known outside of their orders, as planewalkers tend to move around too much to educate others on their abilities. Granted, they do tend to have guilds and methods of communications between other planewalkers to assist those who are new to the area.