[ When he explains the teleportation technology, he gives him another curious look, and for a second seems to be considering his next words carefully. These are two very different problems to him.

Selfishly, he wonders if this man might be able to help him with the issues he's been having traveling via the Gray Space, if this work became anything more than theory, he'd also need to do something about the protective spells and wards in this world.

But there is a larger issue, and he's only just met this person. Most of the people he considers his friends don't know the extent of his abilities.

His expression turns grim. ]

There were those where I'm from who could travel from one world to another. But there was no ambient magical energy to draw from without cost, and it required an immense sacrifice to control that power. I worry that this world is more like mine than yours, even with your device's help.

[ The key itself required the death of a god.

Another pause. ]

Teleporting over land - Thorne uses portals for travel from city to city, but if you're using less-than-official channels of movement, protective wards basically make it impossible to go very far. If you happen to have any ideas, theoretically, for how to bypass those, I'd be curious to hear about them.

[ Since, you know, he'd need to figure that out for his own device to make use of teleportation anyway. ]