Tome of Frost Ward

Source
This item drops from:
 * Highlord Kruul in Silithus
 * Onyxia in Onyxia's Lair
 * Lethon in Ashenvale
 * Ysondre in Ashenvale
 * Lord Kazzak in Blasted Lands
 * Azuregos in Azshara
 * Taerar in Ashenvale
 * Emeriss in Ashenvale