
Zoltun Kule's Library - The wizard has a number of caches throughout Sanctuary, and this one is different from the archives of Zultun Kule in Diablo 3. Corrupted Worldstone fragment is corrupting surrounding area. Diablo Immortal takes place five years after Lord of Destruction and 15 years before the beginning of Diablo 3.
Skarn, the Herald of Terror and Diablo's lieutenant, who's purpose is to bring his master back to life, is the main antagonist.They're corrupted, and if those pieces fall into the wrong hangs it could be bad news.
With Diablo Immortal we learn some pieces of the Worldstone survived. Berger then highlighted the various archangels and demons throughout the games. Matthew Berger, senior designer, dove right into the lore of Diablo, starting with a timeline of the universe, ranging from the creation of Sanctuary by Lilith and Inarius using the Worldstone on one end and the End of Times at the other.
Wyatt Cheng, lead designer, prefaced the panel by saying that the development team hears fans in regards to some of the negativity surrounding the Diablo Immortal reveal, and stressed once more that there are multiple Diablo projects in development. Wrapping up Diablo's presence at BlizzCon, the World and Q&A panel dove into the lore of Diablo and gave a preview of some of the abilities the classes will use in Diablo Immortal.