1. As soon as you are spawned at the city center, you will notice these 3 Raid Bosses in front of the church.
2. They are the guardians of the 3 crystals, you need to kill these Raid Bosses so those crystals can become vulnerable.
3. Crystals are located at 3 city entrances, and monsters are spawning out of them. Monsters will continue to spawn and run to the city center until you destroy the crystals. You will be rewarded for killing those monsters.
4. After you have destroyed all 3 crystals, final Raid Boss will appear in front of the church. After you kill him, the last crystal will spawn inside of the church, you need to destroy it to win the event.
Pat attention to the timer! You will have 30 minutes to complete the event. You will also need to have at least 1% kills for a global reward.
To register for the event, go to Alt+B > Cabinet > Events > TownWar