Visitor event in a nutshell

Time travel never makes sense anyways, as Maplers could, I dunno, just kill the Black Magician RIGHT NOW (time travel to the past to kill the baby. If time traveling to the past is not possible, then just time travel to the future to get that technology. They'll eventually have the technology, as you can already time travel from the future to the present, which is traveling back in time).

It really depends to. Lets say if you make a pocket in time.

A pocket in time is basicly a small universe in which exsists between the past and the present or future which is like a time within a time. Which is like saying "It exsists but it only exsists 10 seconds before the current time." So it's like a frozen timeline. Which basicly describes the scenario of "We were already here, but you could not see us." Which also leads me to believe the future was actualy the present, but in a frozen state in which was not inhabitable.

Or to put it in plain english. Future bing moved a part of the future into the past but made it invisible in a pocket in time.