The Realms Beyond is a tome found on the 4th level of the labyrinth in Diablo. Archbishop Lazarus is presumed to be the writer, and the text is about how he came to know of the meaning of the Sin War by Diablo.
It reads as follows:
- "All praises to Diablo - Lord of Terror and Survivor of the Dark Exile. When he awakened from his long slumber, my Lord and Master spoke to me of secrets that few mortals know. He told me the Kingdoms of the High Heavens and the Pits of the Burning Hells engage in an eternal war. He revealed the powers that have brought this discord to the realms of Man. My Lord and Master has named the battle for this world and all who exist here the Sin War."
|Diablo I Tomes|
| Story Tomes — Dark Exile • Great Conflict • The Realms Beyond • Book of Blood • Mythical Book • Book of the Blind • Sin War • Tale of the Three • Wages of Sin are War • Binding of the Three • Tale of the Horadrim • The Black King • Steel Tome|
Items — Ancient Tome • Fungal Tome
Hellfire Tomes — Journal: The Meeting • Journal: The Tirade • Journal: The End