Arena Spoils
Arena Spoils is a container object that looks like a chest and spawns after defeating mobs led by Theldren specifically summoned by [Banner of Provocation], a quest item, in the Ring of the Law of Blackrock Depths.
Loot
[Malgen's Long Bow]
[Ironweave Mantle] (for Priest, Mage, or Warlock)
[Shroud of Arcane Mastery]
[Lefty's Brass Knuckle]