Shadow Step can do much more than one might imagine, indeed. For there is a way to "map jump." One may see the results of some of my journeys here, beginning about half the way down the page. To accomplish the technique it is necessary to have a mount. Note the side of the mount on which the character lands upon dismounting. That is the side that should be snug against the inaccessible area in which you want to travel. It may take a bit of finessing the mount as close as possible to the border area, but when you have it just right your character will dismount just outside the usual field of play and enter a heretofore area of inaccessibility. Once inside, Shadow Step should be employed each time in order to travel further from the current point of origin. It's really quite interesting to discover the things hidden within the game which the unenlightened player would never imagine existed. So, let me pose this query, are you feeling adventurous?