Sorry for the thread typo - major brain fart there. I have a very basic premise for my latest project; protag pursued by antag(s) because he is in possession of something very valuable. I'm looking for an item that is not only very much sought after, but one that could deepen/drive the plot because of what it does/its properties, etc. An example would be the perpetual battery from the Tom Cruise film Night and Day. Bare in mind this will have a futuristic (earth) setting so we're only limited by our imaginations. Thanks in advance.