Magmas Arm

Acquisition
The Magmas Arm can be found:

Core
 * Fissure of Woe
 * Chest of Woe
 * The Underworld
 * Underworld Chest
 * Isle of the Nameless
 * Zaishen Chest

Prophecies
 * Ascalon (pre-Searing)
 * Dragon's Gullet
 * Spark of the Titans
 * Hell's Precipice
 * Hand of the Titans
 * Risen Ashen Hulk