Balur's Beacon Invasion is a time-limited Event that takes place once a month. While it is on, participating Leagues must defend their Beacons against Attack Waves from Balur's Black Horde in exchange for spectacular Rewards.
A League can participate if its League Marshal or a League Captain authorizes it to do so, and only if it controls at least one Beacon.
Rules
While the Event is on, Balur will launch five Attack Waves upon the Beacons of participating Leagues. Each Wave will be launched randomly during a four-hour Attack Window, with the first Attack Window opening the moment the Event begins. Attack Windows are separated by four-hour cooldown periods. During cooldown periods, Balur's forces will not attack the Beacons of participating Leagues.
If a League controls multiple Beacons, Balur's Horde will attack them one by one in random order during Attack Waves. Each battle at a Beacon will generate a Battle Report.
To repel an Attack Wave, a League must win at least 75% of the battles that take place during that Wave. If a League fails to repel two Attack Waves in a row or no longer controls at least one Beacon, it will no longer be able to participate in the Event. You can see both how many Beacons your League has successfully defended and how many were attacked by Balur's forces in the "Beacons Defended" column of the Event window.
If a League loses a battle at a Beacon to Balur's Horde during the Event, this cannot result in the Beacon being captured or its Level downgraded.
Note that while the Event is on, Beacons held by participating Leagues will only be attacked in line with the rules of the Event and will not be subject to any other attacks from Balur's forces.
Rewards
After each battle, Leagues will earn Dark Essence. The amount of Dark Essence earned will be shown in Battle Reports. Also, repelling Attack Waves will earn League Members League Gold, which can be spent at the League Shop.