Arena

Overview
The Combat Arena is a building that is released in the 4.5 Patch. It's part of the PvP system that allows players to play PvP in real time (Synchronous) against random players and friends, as well as Asynchronous against other players' defense armies, for Gold and Resources. It is unlocked at Level 5 along with the Battle Flag, which is also needed for PvP.

To participate in Asynchronous battles, players need PvP Energy which is generated by the Arena at a rate of 1 per hour. Since the 4.7 Patch, players can also acquire PvP Energy as a reward for winning battles in the Arena.

Trivia

 * In the animation, a bombless Dirigible can be seen floating above the arena.
 * The battle map resembles a combination of a sports pitch and Gladiatorial Arena.