Walk Beyond Time

Your sphere of influence includes only you. Other players' spheres of influence don't include you. (You play as though your opponents aren't in the game.)
Walk Beyond Time enters the battlefield with three journey counters on it. At the beginning of your upkeep, remove a journey counter from it, then if there are no journey counters on Walk Beyond Time, exile it. Other effects can't change the number of counters on Walk Beyond Time.