Obsidian Helm

The Obsidian Helm is a rare helm sold by the Blacksmith for 8 obsidian ore. It offers a large amount of armor.

Source

 * Blacksmith

Obsidian Set
Besides providing 15 max stamina and a very large amount of physical armor, this set also allows you to wield the Sword of Obsidian:
 * Obsidian Helm
 * Obsidian Breastplate
 * Obsidian Gauntlets
 * Obsidian Greaves
 * Obsidian Boots