I always like to go against first impressions, so how about something like this:
The Chalice of Kings is crafted from the skull and crown of King Dorandel, who was renown for his wisdom and foresight. He ruled over a long and peaceful age, a peace hard-earned through wise ruling: knowing when to negotiate, when to fight, how to win the love of the people, how to earn the respect of your peers. When Dorandel's death drew near, the king consulted with his mystics and drew up plans for this chalice.
The Chalice can be used once a day to consult the wisdom of Dorandel and the spirits of other wise rulers. The user must pour and then drink liquid from the skull in order to access its magic. Depending on the quality of the liquid, different powers can be accessed:
Water, wine, or ale worth 10 gp or less: Identify
Wine, Ale, or Liquor worth 11 - 25 gp: Augury
Wine, Ale, or Liquor worth 26 - 100 gp: Clairvoyance
Wine, Ale, or Liquor worth 101 - 500 gp: Divination