Rare spawns mobs have a "*" mark next to their a crown or skull symbols. (FAQ: TSW Monsters rating and symbols: http://www.athenpaladins.org/forums/vie ... =98&t=7075)
They are supposed to be solo-able and drop Blue items usually.
Note that World bosses are OTHER mobs, normally not solo-able (group of 5-10 people with appropriate gear for the zone) and they wear a triple symbol crown + skull + wings. At the moment, they are NOT balanced yet.
Kingsmouth
[397, 27] The Reawakened (Father Appleby)
[34, 862] Soloman's Omen
[232, 508] Mr. Freezie
The Savage Coast
[340, 740] Lurking Revenant (on top of the gas station)
[498, 912] Umbral Brood King
Scorched Desert
[404, 392] Ainn the Habringer
[232, 549] The Errant Drifter
Deathstalker (Note: random chance to spawn at any Burrowed Sunstalker sand drifts)
The Last One (on the stair path to The City of the Sun God)
City of the Sun God
[856, 120] Adramelech, the Chancellor of Hell
[787, 542] Emissary of the Dead Nations
[644, 692] Kiya, the Pharaoh's Concubine (not confirmed in 0.9, waited for 2 hours and did not see it spawn)
Besieged Farmland
[620, 820] Ursine Horror
[969, 762] Wailing Bride
[1206, 239] Troll
Shadowy Forest
[1006, 878] Sabrab
[767, 718] Fecund Changeling
Carpathian Fang
[816, 344] General Blasius
[430, 1006] Traitor of Basarab
[470, 1012] Executor
Shadowy Forest
[1006, 878] Sabrab
[767, 718] Fecund Changeling