The Arena is an area for PvP combat located on the Omega Server. Unlike the PKing that occurs in other parts of The World R:2, all combat in the Arena is consensual. Some guilds exist solely for Arena competition. As items cannot be used in the Arena, Harvest Clerics and other casters are considered invaluable.
There are three Arena circuits by level, called Palaces. In the Japanese version, the name of each Palace was preceded by the worlds Crimson, Cobalt, and Dragon respectively, seemingly referring to the Epitaph of the Twilight.
In the Arena, teams of up to three players fight against each other in organized matches. Successful wins earn each team points, which increase their rank in their arena Palace. After a certain period of time, the top 16 teams in a Palace will face each other in a tournament. The winner of this tournament then holds an exhibition match against the current Emperor. Whoever wins becomes the current Emperor of that palace, and will keep that title as long as they continue defeating challengers. A player can only be an Emperor of one palace at a time.