Diablo 4's rich lore is primarily conveyed through in-game texts and compendiums, but a physical art and lore book released alongside the game has provided further insight into the fates of the three Prime Evils during the game's timeline. Set three decades after Diablo 3's events, players are transported to the realm of Sanctuary where Lilith, daughter of Mephisto, has made her return. Her objective is to strengthen the inhabitants of Sanctuary to battle Hell itself, albeit through enslavement and servitude to Lilith, while also eliminating the Horadrim.
The Horadrim have a pivotal role in Diablo 4 and the franchise's timeline, having been created by archangel Tyrael to combat the three Prime Evils - Baal, Mephisto, and Diablo. According to Diablo 4's lore, the Horadrim have possession of the remnants of each of the Prime Evils, including the Horn of Diablo. However, to fully comprehend why the Horadrim desire these artifacts and why Lilith wants to destroy them, one must delve into the events that occurred thousands of years prior to the original Diablo.
The Endless War, Sanctuary's Creation, and Diablo's Return
According to Diablo series lore, the timeline begins with the emergence of Anu, an immensely powerful spirit that expels all evil from itself to create Tathamet, a multi-headed beast. The two engage in a seemingly endless conflict that culminates in their mutual destruction at Pandemonium. Tathamet's demise leads to the creation of Hell and its demons, while Anu's death results in the birth of the High Heavens and Angels. The offspring of Anu and Tathamet carry on the conflict in a second Endless War that lasts for thousands of years. Eventually, Inarius leads a group of angels and demons to steal Anu's Worldstone and create the realm of Sanctuary, where they can coexist peacefully. The Nephalem, children of Inarius and Lilith, inspire others to join them, leading to the birth of the Ancients, from which humanity emerges. Roughly 3000 years later, humans with dark hearts help to resurrect Diablo, beginning a new chapter in the ongoing saga.
What Happened to Diablo After the Events of Diablo 3
After the climactic battle in Diablo 3, the Horadrim have acquired Diablo's remains along with other powerful artifacts such as the Eye of Baal and the Brain of Mephisto. These artifacts are vital for the Horadrim as they work towards their mission of comprehending and defeating the infernal forces of the underworld. However, Lilith is determined to eradicate the Horadrim and any remnants of the Prime Evils as they stand in the way of her plan to enslave humanity and unleash their inner potential as Ancients.
Diablo 4 is available now for PC, PS4, PS5, Xbox One, and Xbox Series X/S.