Mageduel

Combats between spellcasters are legendary, often resulting in the destruction of castles, villages, and local terrain. In the case of large-scale battles, entire regions of land can be destroyed, resulting in barren locations.
Fearing that such acts might turn the world to little more than a battered magical war zone (and not wishing talented mages to destroy themselves in pointless battles), the "mageduel" was put in place, and every arcane spellcaster in Faerûn knows how to invoke this rite. While reckless or murderous mages prefer traditional (lethal) spellcasting to settle their differences, most civilized spellcasters enjoy the opportunity to prove their skill in a mageduel. It has become tradition that every mage fair has a mageduel, and most of any reasonable size schedule two or more, offering prizes for the victor, while others make wagers on the outcome. A mageduel normally has only two participants, although there have been times when three spellcasters have faced off simultaneously, or pairs of opponents engaged each other. The rules for a mageduel are the same, regardless of the number of participants.
Mageduels are as much a conflict as they are a trade. Some learn trough testing their skills against their pears or sometimes wagers are put in place, either way they are a well known practice.