I killed Keloss the Ruthless tonight, and a bone from the chest identified as "Item Lore: The bone of a bold invader". So either this mob is wrong, or the bosses in Sverag can drop 1 of 2 different Berserker Bones.
Wouldnt let our raid loot the chest after killing Prexak, gave message you have not earned the right to rummage these bones. Anyone else had this, or knows why?