Ghazghkull Mag Uruk Thraka (usually shortened to Ghazghkull Thraka) is an Ork Warlord of the Goff klan and a mighty prophet of the WAAAGH!. He is the single most influential Ork in the galaxy in the late 41st Millennium, and billions of greenskins march to war in his name.

Since Ghazghkull's rise to power, he has led countless campaigns of destruction. He has crushed Aeldari war hosts, banished tides of daemons, and smashed phalanxes of Necrons to so much sparking scrap.

Yet his greatest battles have always been fought against the servants of the Emperor of Mankind. Ghazghkull's sheer, unstoppable brutality has left countless worlds of the Imperium blazing in his wake and reduced the mighty Hive World of Armageddon, during the Second and Third War for Armageddon, to a never-ending cauldron of bloody battle.

Yet Ghazghkull is not satisfied. Gork and Mork have greater plans for their prophet, plans they see fit to deliver amid agonising visions of a galaxy ablaze with green fire. At their behest, Ghazghkull is beginning his greatest work.

He will travel the galaxy, subjugating every Warlord and gathering every Ork to his banner until the stars themselves shudder to the thundering footfalls of his horde. Ghazghkull is gathering the Great WAAAGH! of Gork and Mork themselves, a WAAAGH! that will drown the galaxy in a war so great that the gods themselves will tear their way out of the Warp to join the fight.

Ghazghkull's greatest nemesis in this fight is the Imperial Commissar Yarrick.