Heaven's Fall, Kryss of a Thousand Lies (heroic)

Source
This item drops from the Lich King in the heroic 25-man version of Icecrown Citadel.

Trivia

 * The item description is a biblical reference, Proverbs 26:28.
 * The name of the item is an inverted reference to The Sword of a Thousand Truths, an item that was featured in the South Park episode, "Make Love, not Warcraft."