User blog comment:Cass delau/Fey/@comment-38504801-20190815010903/@comment-38504801-20190815021132

It's not time travel in a conventional sense, it's universe travel more than anything. To go back 15 years back, you would create/find a universe identical to yours but it was created 15 years later than your universe. To go forward it's the same but with an identical universe created earlier than your universe.