According to Diablo II, the Four Cavaliers came from a race cursed by angels and demons-nephilim, an extremely militant race, which brought disasters to countless countries.
Tired of endless killing, the four of them began to worry that their actions would destroy the balance between heaven and earth, so they turned to work for the anxious parliament in exchange for the vast power of Xinghai. They are the four horsemen in the book of revelation.
A detailed introduction of the four archangel knights
The four horsemen of the apocalypse are also called the four horsemen of the end, or the four horsemen of the apocalypse. These four are: conquest of war, slaughter, famine, hunger and death.
The four horsemen of the apocalypse were ordered to be stationed in the military area. The Four Horsemen of the Apocalypse were selected and promoted by the most elite death knights in the Scourge. Kel 'Thuzad personally selected four cavalry, namely Lord Kutas and Sir Selik.
Duchess of Braumu, Sir Alexander Mograine. Among them, Mograine is the leader of the four knights, but he has disappeared. Kel 'Thuzad reappointed Baron rivendell as the new Four Horsemen of the Apocalypse and became the leader.