"One of the rarer talents is clairvoyance, or prophecy. The future isn’t an easy thing to predict. Every moment is in flux until it happens; events can to either way and the seer does not know until it happens. The strongest seers can generally only see two hours into the future on a major event affecting large groups of people he or she has personal bonds to." Spock’s expression was very sober. "The priestesses of Seleya have been dreaming of death and destruction, of Vulcan dying in fire and ice for two years now. The cause has never been identified, only that it is huge and all encompassing.