Arcanum of the Savage Gladiator (Horde)

The Arcanum of the Savage Gladiator is a head enchantment that adds 30 Stamina and 25 resilience rating.

Source
This item is a reputation reward; you must be with Horde Expedition to buy it from the following vendors for :
 * at Warsong Hold in Borean Tundra
 * at Vengeance Landing in Howling Fjord