This article contains lore taken from Warcraft III: Reign of Chaos, Warcraft III: The Frozen Throne, the manuals, and/or official bonus maps.
Grants the Hero and friendly nearby units 1 bonus armor. Does not stack with Devotion Aura.
Source
Cairne Bloodhoof can find this in The Oracle, chapter 7 of the Warcraft III orc campaign, The Invasion of Kalimdor.