Broker Hunting Rune

Broker Hunting Runes are found outside Desmotaeron, part of the Beastwarrens in the Maw. They drop from the following mobs inside and near the Echoing Caverns:
 * Rune Extractor
 * Rune Hunter
 * Rune Inscriber
 * Rune Scribed Husk

As a quest objective

 * Rule 6: Concealment is Everything

Trivia

 * During the beta, the item was named Genesis Rune and had the following flavor text: "A word of binding which twists the remnants of a broken soul beyond recognition."