System for a zero-combat dungeon crawl?

[daniel_ream]

[...] it's traveling FTL in comparison to the rest of the universe

That's the problem. If you can transmit information from one point to another faster than light can travel the intervening distance, it doesn't matter what the method is. It's fairly simple to set up a situation where you can violate causality as a result, and then the universe falls apart.

Unless Einstein is wrong, but if you're going to postulate that you're into Clarke's Third Law territory.