Entering the Arena
In the bottom left-hand corner of the overworld screen you will see two crossing swords. If you click on this icon, it will search for opponents, and you will have the options of Leave or Battle. To engage battle, you must use an Arena Token (aquired from bosses, shops, arena battles) and have opponents available to battle. Opponents are usually slightly above or below you in rank. If you win the battle, rewards include EXP, gold, orns, and various items.
Battling in the Arena
When you enter an Arena battle, you will be at full health and mana. Your character will not reflect any damage taken or mana spent when the battle is complete. This makes Arena possible without a need to heal before or after. You will not be able to Run or use Items. The opponents you fight in the arena are actual players in the game, controlled by the game's AI. You will always attack first. When your opponent is defeated or defeats you, the battle is over. You receive EXP, Orn, and gold for winning the battle. Gold rewards are tied to you and your opponent's level.
Another way to enter PvP is to challenge players for control of their dukedom.