Essence of Aszune

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This article or section contains lore taken from Warcraft III: Reign of Chaos, Warcraft III: The Frozen Throne, the manuals, and official bonus maps.

Legends speak of an intelligent Orc who found the Heart of Aszune. This is the essence of her heart, precious to the Night Elves. It has the power to heal the Hero who wields it. This item is permanent.

Source

Kael and Lady Vashj can find this in The Dungeons of Dalaran, chapter 3 of the Frozen Throne alliance campaign, Curse of the Blood Elves.