• Arcanum of Protection
• Item Level 50Disenchants into:
  Not disenchantable
• Binds when picked up
• Use: Permanently adds 12 dodge rating to a leg or head slot item. Enchanting the item causes it to become soulbound.
• 1 Charges

The Arcanum of Protection is a enchanted gem that will add a dodge bonus effect to either a head or leg item. This effect will not stack with other enchantments on the item.

Source

The Arcanum of Protection is a quest reward from the quest  [60] Libram of Protection which starts with Lorekeeper Lydros in Dire Maul. To complete the quest, you must turn the following items:

• 1x  [Libram of Protection]
• 1x  [Pristine Black Diamond]
• 2x  [Large Brilliant Shard]
• 1x  [Frayed Abomination Stitching]

Arcanum of Protection as a Quest Objective

•  [60] The Savage Guard - Arcanum of Protection

Patch changes

• Patch 1.11.0 (20-Jun-2006): The Arcanum used to be needed for the special class-specific Zul'Gurub enchantments. However, the requirement was removed. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB