OK, the golden beast event.
When I get it done, there will be a worldwide emote indicating that a magical "something" is hiding out somewhere. You will not get any clues as to where, including what zone. Not trackable, just like a GB.
When you hail it, it will bump the server-wide exp bonus to either 50% or double the current bonus, whichever is higher. This will last for a few hours. We will spawn these periodically to encourage people to go out and explore! We're not (probably) going to bury them in Nagthilian or anything, but you might find them in very odd areas.
Be the server hero. Find these guys when you see the emote. The whole server will know of your good deed. You'll get a personal reward as well.