Circle of Blades

The Circle of Blades is a form of duel fought between two elves, usually to the death. To withdraw from it, for any reason, forces the given elf to a temporary exile from their home city for a number of years. According to some, it is quite common for withdraws to take place among the aristocracy, though to do so is to lose face amongst one's peers.

Source

 * Blood of Aenarion, Chapter 20