An'ggrath the Unbound, also known as the Guardian of the Throne of Skulls, Most Favoured of Khorne, Lord of Bloodthirsters and the Deathbringer , is a Greater Daemon of Khorne, known as a Bloodthirster.
An'ggarath the Unbound, the mightiest of Bloodthirsters, is the most favoured of Khorne. In the pantheon of the Blood God's servants, Ang'garath stands next to the Skull Throne at Khorne's right hand. Amongst the ranks of Khorne's daemonic followers Ang'garath is perhaps the greatest and most revered, created by his patron god to be the ultimate expression of murder and violence, extolling Khorne's blood creed across the width and breadth of the galaxy. No-one can stand before him and hope to live. Ang'garath has been Khorne's most favoured since Tzeentch inspired Khorne's then favoured slaughterer, the Bloodthirster known as Skarbrand to strike at his own master. Skarbrand was cast out from Khorne's realm and exiled for all eternity, and An'ggarath was raised up as Khorne's favoured son having replaced the old in their lord's affections. Though the two Bloodthirsters are eternal foes, Khorne has decreed that the two can never meet, for their value as slaughterers is too great to be wasted upon each other.
The Lord of Bloodthirsters is rightly feared throughout the galaxy, even amongst the Inquisitors of the Ordo Malleus and within the ranks of the Grey Knights Space Marine Chapter. His name is only ever whispered in trepidation, for An'ggrath invokes dread amongst even the mightiest of the Emperor of Mankind's servants. Fortunately, An'ggrath has only been summoned forth from the Warp on only two occasions within the past 10,000 years. For few would ever be so bold as to attempt to summon the vile Greater Daemon forth, for to do so, is to risk the Blood God's terrible wrath. One must first have pleased Khorne with their blood devotion to murder and slaughter. On the two occasions he was successfully summoned into the material universe, his appearance resulted in terrible destruction to the realm of the Imperium. Only after terrible losses were the Grey Knights able to stop the Bloodthirster's rampage.
On the Imperial world of Vraks Prime during the height of the Siege of Vraks campaign in 830.M41, the mighty Chaos Lord, Zhufor the Impaler, tempted his patron god's wrath. With the aid of the daemonancers of the Sanctified, the long carnage and of brutal Vraksian campaign drew forth An'ggrath and his daemonic legions to the material universe through a portal. Only when Inquisitor Lord Hector Rex confronted the Bloodthirster in single combat, wielding a holy sword forged to destroy such loathsome daemon-lords, was An'ggrath stopped before Vraks was turned into a charnel house.