Blocks a negative spell that an enemy casts on the Hero once every 40 seconds.
This section concerns content exclusive to the Warcraft RPG, and thus is not necessarily canon.
This hemispherical disk is made of an unknown material that is not quite metal, but seems just as sturdy and solid. The translucent surface appears to swirl and dance with vibrant colors hiding deep within its body.
Arthas and Anub'arak can find one in A Symphony of Frost and Flame, chapter 8 of the Frozen Throne scourge campaign, Legacy of the Damned