Anyone here knows Fate Stay Night? this is a good anime..
For centuries, a covert mystical power play has been wages for possession of an all-powerful artifact - the legendary Holy Grail - that rages on to this very day. Fuyuki City has become the site of the next Holy Grail War which has resulted in unexplained accidents and mysterious deaths. No risk is too great, no sacrifice too high and no spell is too dangerous, as chosen sorcerers, known as "Masters." have each summoned a spiritual warrior, known as a "Servant," to team up with in a secret battle royale to destroy all of their rival mages.
hope this help on you ^^ coz im not good in explaining ^^