Here is a link to all of the over world summons!!! https://www.reddit.com/r/naruto_online/comments/4v965l/summons_on_the_world_map/

When you get to a certain point in the Survival trail (I forgot when exactly) at the bottom of the xcreen you'll see what looks like the Hokage Tower (Red building) click on that and you'll go to the trail (Practice?) breakthrough. Hope this is what you meant?