Another possibility, brought to you by Worm. (Destiny)

by Dagoonite, Somewhere in Iowa, lost in a cornfield., Saturday, March 07, 2015, 12:45 (3796 days ago) @ scarab

Time travel requires a lot of energy, no matter how you cut it. Wormholes require quite a bit, too. You know what else requires gobs of energy? Breaching dimensions.

Imagine a thousand alternate planets (what's the plural for Mars?). Now imagine a small breach in the core of our Mars, one that overlaps all these planetary bodies. A stable breach might cause a serious effective change in not only density, but also a great deal of heat. This restarts the core(s), allowing the lucky version of the planet that the breach manifests in to have a far stronger magnetosphere than would normally be possible. (Sure, this depends on the Many Worlds Theory, but whatever.)

For those of you who have read Worm, congratulations! Mars is now an Endbringer!*

Interestingly, this would also allow the Traveler access to the very energy necessary to perform these feats. Once you change "space magic" to "dimensional space magic"...

"Hello, sapients. Look at your space magic, now back to mine. Now back at your space magic, now back to me. Sadly, your space magic isn’t mine, but if you started using dimensional space magic, it could be like mine. Look down, back up, where are you? You’re on Venus, lush with jungles due to shunting of atmosphere. What’s in your hand, back at me. I have it, it’s a sapient drone capable of bringing the dead back to life and opening doors. Look again, Mercury is now a garden world. Anything is possible when you use dimensional space magic. I’m on a horse.”

* I am not responsible for getting anyone hooked on the best and longest superhero story I've ever read.