Four Great Clans are the four greatest clans in the Great Yan Empire. Usually the Four Great Clans reputation is known throughout the Great Yan Empire. So no ordinary faction dares to dispute them. However their reputation is heavily discounted in the Great Desolate Province. 
Lin Dong becoming the Hundred Empire War champion, the Lin Clan became the leader of the Four Great Clans.
There are now only two powerful factions in the current Great Yan Empire. The Lin Clan and the
Eagle Sect. The other three Great Clans had fallen from grace. Although this does not mean they became weaker. They just couldn't keep up with the growth rate of the Lin Clan and the Eagle Sect.
Di Family, Lei Family, Lin Family, Liu Family, Liu Family (Dayan Province), Mu Family, Song Family, Xie Family
Bloody Vulture Dojo, Eagle Martial Dojo, Raging Blade Dojo
Lin Clan, Wang Clan, Qin Clan, Huangpu Clan, Gu Clan, Wei Clan, Su Clan, Song Clan, Shentu Clan, Blood Demon Shark Clan, Immortal Sage Whale Clan
Blade Slaughter Gang, Blood Wolf Gang
Black Dragon Stockage
Blood Cloth Sect, Ghost Blade Sect, Iron Mountain Sect, Great Devil Sect, Ancient Sword Sect, Green Wood Sect, Lion Fist Sect, Great Yuan Origin Sect, Heavenly Luo Sect, Barbarian King Sect, Sea Cloud Sect, Earthsea Sect, Illusionary Demon Sect, Blood Blade Sect, Sky Shark Sect, Covering Sea Sect, Ice Spirit Sect, Eagle Sect, Great Desolate Sect
Thousand Gold Association
Ghastly Puppet Cult
Martial Alliance, Tiangang Alliance, Ground Evil Alliance, Four Titans Palace, Yuan Destruction Alliance
Nine-tail Tribe, Nine Lives Heavenly Cat Tribe, Demon Lizard Tribe, Dragon Tribe, Nine Phoenix Tribe, Blood Vulture Tribe, Devil Tiger Tribe, Kunpeng Tribe, Dark Abyss Tiger Tribe
Four Great Clans, Symbol Master Guild, Yan City Lord Manor
Heavenly Demonic Marten, Bliss Valley, Demonic Wind Cave, Universe Cave, Sword Heart Island, Black Dragon Pirates, Sea Demon Race, Sky Merchant Court, Mysterious Sky Hall, Nine Serene Gate, Thunder Palace, Flame Divine Hall, Thousand Elephant Mountain, Dark Sea Stream, Devil Prison, Hundred Beast Ridge, Deep Lightning Mountain, Tiger Devouring Army, Sky Crocodile Army, Blood Dragon Hall, Golden Ape Mountain, Ghost Condor Stream, Mang Mountain, Darkness Saint Tiger