- Note: "Trag'Oul" is considered the canonical spelling, for an explanation, see below.
Trag'Oul is a mysterious dragon-like being who guards Sanctuary and maintains the Balance between the High Heavens and the Burning Hells. In Richard A. Knaak's The Sin War trilogy, he is depicted as a constellation of stars, in each of which, a different part of life is shown - past, present, and future choices to be made, so one cannot see a definite future. Trag'Oul's exact origins are unknown, although it is hinted that he is not a unique being, that other worlds have guardians similar to him. He has not been seen since the Sin War ended.
Book of CainEdit
"Trag'Oul a guardian of Sanctuary. by most accounts., aligned with neither the Heavens nor the Hells. Although information is scarce, he reportedly aided Uldyssian and the edyrem during the Sin War., intent on keeping our world free from both angelic and demonic influences. The Books of Kalan describe this mysterious entity as a celestial dragon whose body resembles a constellation of stars." - Deckard Cain
From The Veiled Prophet:
- "Only once before had Trag'Oul entered Sanctuary, and that had been just after the slaughter of the refugees by Lilith, and Inarius's subsequent reactions. At that time, the dragon had materialized for just a few seconds, long enough to lay the groundwork for Rathma's discovery of him." Another intervention is attempted by the dragon after learning of a pact between Diablo & Inarius. This is swiftly stopped by entities that keep the balance over worlds of their own, like the dragon. They tell Trag'Oul that "This goes beyond Sanctuary now. Beyond all of us who stand sentinel." & "The war is coming to Sanctuary, and if you interfere with what the balance demands, it and all existence will be forfeit."
Few have ever been in personal contact with the dragon. Most notable is Rathma, first Necromancer and of the Nephalem. Rathma was the first on sanctuary to be contacted by Trag'Oul. Rathma learns of the balance, the worldstone, and how the world was created.
The second necromancer was Mendeln, brother of Uldyssian. Mendeln was personally tutored by Trag'Oul and Rathma about the balance. He was given a magic bone dagger during his training by Trag'Oul. He also learned to see and speak to the dead during his journey with his brother during the Sin War.
The Necromancer set, Trang-Oul's Avatar, is the first mention of the dragon.
Blizzcon 2011 Lore Open Q&AEdit
"Trag'Oul was last seen in the Sin War Trilogy. He is sort of this world-protector dragon. He might be a living constellation. He might be a personification of the past, present, & future of humanity. He is a mysterious character. He is the founder of the necromantic order and is very concerned with balance. He is not around anymore, after he set the necromancers on their path. He's gone, we don't say where. It's one of the mysteries of the universe that are out there right now." - Kevin Martens (Lead Content Designer)
- Trag'Oul has undergone many spelling revisions in Diablo lore, he was called Trang-Oul in Diablo II in the set, Trang-Oul's Avatar and revised as Trag'oul in the Sin War novels. Since the novels are canon as of Diablo III, and as they were released after Diablo II, we can assume that the great dragon's name is indeed Trag'Oul.
| Supreme Creator — Anu (Tathamet)|
Askari Pantheon — Athulua • Hefaetrus • Karcheus • Kethryes • Lycander • Philios • Zerae
Ancients' Pantheon — Korlic • Madawc • Talic
Rathman Pantheon — Trag'Oul
Shaptev Pantheon — Inna
Umbaru Pantheon — Giyua
Vecin Pantheon — The Allmother