"I challenge you to a duel!"
Duels are a great way to prove who the better warrior is. Perhaps another player has offended you. Challenge them to a duel! "/slap playername". You can have a duel (one-on-one fight) with another player of either the Alliance or the Horde.
To start a duel, select the player you wish to duel. Right-click on the player's portrait and select "duel". Alternatively, you can also select someone and type "/duel" with that player selected or type "/duel playername".
A battle flag will be placed near you indicating that a challenge has been issued and a duel might begin. The person you challenged must accept the duel or you will not be able to attack them. There is a short countdown before a duel starts. Watch the color of their character's name. It will turn red when the duel has begun. A sound will also play when a duel begins.
If you try to run too far away from the other player after starting a duel a special box will pop up letting you know you're about to exit the dueling area: "Exiting duel area, you will forfeit in X seconds." If you forfeit, a message of your cowardice will be broadcast to the region. Example: Player 1 has fled from Player 2 in a duel.
The result of the duel is announced to the current region (zone). Example: Player 1 has defeated Player 2 in a duel.
Additional Information
You can't duel in certain areas.
You can't duel players you can attack normally.
Skills will not increase from use while dueling or engaged in PvP.
Dueling players can cast helpful spells on their allies (but not vice versa).
Players can no longer swap inventory gear while dueling.
Dueling is allowed within Everlook.
Dispel Magic cannot be used on players participating in a duel unless the caster is in the duel.
You are considered in combat for the entire duration of a duel.
Tips
Some players will move in circles (strafing) as you fight, especially Rogues. You'll have to learn how to run and rotate to combat this technique.
I'll bite your knee caps off!
Duels are helpful to test new spells and item effects.
Some players consider it cheating to use potions during a duel. You might want to ask before the challenge what the "rules" are.
During a duel you shouldn't get any help from allies such as healing. Buffs are debatable.
Common Questions
Now bring me shrubbery!
What do I win if I win a duel?
Your reward will be a message broadcast to the entire region (zone) announcing your win. The loser also kneels before you.
Do I lose anything if I lose a duel?
There is currently no penalty, so you can duel all you want.
Will I die if I duel?
Not usually, but it happens sometimes.