From server save November 11 until server save November 15, ten fire basins need to be kept burning to dispel the lingering gloom. But watch out: if a single light goes out, your world has failed!
If you are interested in helping, you may want to visit Lucius in Yalahar once the event has started. Also, some of we provide detailed guide with useful information about this event. It is also a good idea to check your world board to see if other players have already started with preparations for the Lightbearer.