I Space-Time Gate

A man who saw Elijah's surprised expression turned to him and explained.

"It is your first time here? This is the most precious treasure of the time palace. The space-time gate, it can send countless people through time and space. It is with it that we've been able to secure our position here, this time it will be used  to open the gate to a random time and space."

"Wait." Elijah interrupted, then continued. "It is not dangerous to mess with the timeline?"

"Haha. You are not wrong, but I guess you can't  understand the true valor of the gate. You can go to anytime, anywhere and all the changes can be reverted to continue the right course. The gate could do even more, but  it depends on the affinity with the user. No one besides the palace head had more than 50% compatibility with the gate, thus only being able to unleash up to 50% of it's true potential."