During these events, one or more epic monster squads will appear on the map. You can only defeat them by joining forces with other players from your Kingdom. 

The more monsters you kill, the more tournament, Valor, and Experience points you earn. If you don't kill any monsters during an attack, you won't earn any points.

The size of the rewards granted for achieving personal goals and the difficulty of the goals depend on the level of your army, while your division is determined by the level of your Hero, unless stated otherwise in the rules of the event.

Only one of the following events can be active at any time in the game:

Doomsday 

Only one Captain can attack the monster.

The event grants you increased Valor and Experience points. 

Arachne's Swarm

All three Captains can be sent to attack. 

The event grants you increased Valor and Experience points.  

Armageddon

Only the Hero can be sent to attack.

The event grants you increased Valor and Experience points.  

Hellforge 

Only one Captain can attack the monster.

Completing personal goals in this tournament earns you coins, which you can exchange for equipment in the special shop that is available only during the tournament. Equipment items of a selected quality can be purchased directly. 

Coins are saved in between each event and don't disappear. 

Shadow Invasion

Your Hero and Captains can attack the monster together.

This event offers a unique opportunity to earn a substantial number of Conquest points.