After so long, a boss creature or two may appear. It can either be seen throughout a certain region or inside a specific territory.
Bosses can be distinguished from normal enemies by the following:
Larger and much higher stats
A special title
Special markings
Defeating a boss individually is practically impossible, so it is best to deal whatever damage you can before fleeing, unless you're willing to get a life-threatening injury. The next time a player encounters said boss, it's health will be lowered. This makes defeating bosses is a dangerous, yet rewarding team-effort. All participants (who survived) receive a large amount of SP and access to said title.
Depending on where it lives, either a region-wide or local notification will be sent when one is discovered.