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Message: <blockquote data-quote="Dungeoneer" data-source="post: 6254244" data-attributes="member: 91777">Have you ever read Stross's "Iron Sunrise"? At the beginning of the novel, somebody uses a 'causality violation device' to wrap the core of a star in a pocket universe, age it billions of years, and then return it to the star as an ultra-dense chunk of iron a split-second after it was removed. This results in the instantaneous detonation of the star, destroying a nearby civilization. I don't know what tech level that is, but it's pretty cool.Speaking of causality violation and/or time travel: the first book in Stross' series introduces a powerful AI that has given itself the task of enforcing the laws of causation. Basically, it hunts down anybody who tries any time travel shenanigans and punishes them. It might be a good idea to have optional 'time cops' in the NEW system so that the GM can side-step all those thorny time travel problems if they so choose. Because basically once you have time travel, no options are off the table and you're pretty much playing a different game altogether.</blockquote>