Cailan's Helm

The helmet of King Cailan Theirin, leader of the forces at Ostagar. It can be found in the Return to Ostagar DLC, where it is looted off of one of the darkspawn generals.

When equipped in a set with Cailan's Greaves, Breastplate, and Gauntlets, the character's fatigue is reduced and he gains a bonus to health regeneration while in combat.

Trivia
This helmet is actually never seen in the game until you loot it. Cailan is never shown wearing the helm in any cut scene.