[quote=@Legend]
<Snipped quote by souleaterfan320>

No he's not. He travels through time. 
[/quote]

But, he does it in a manner where he can slip in, undetected from that current universe and its laws, and just change certain parts to get the desired outcome without the adverse side effects. More of a time manipulator than a time traveler. He just makes the portals because he thinks of what he does as walking through a door.