Under Attack

Don't you see what the fiends are doing? Every night they attack the camp. Some say to get at our oathgold, but I'll tell you true! They're after us! We fight em' with everything we got, but when the smoke clears, they're gone - and with our dead to boot! They're taking 'em and doing somethin' unnatural to 'em. It's got to stop, or there won't be a one of us left to work the mine. Take this 'ere mortar an' pestle. With it, you'll be able t' mix up an elixir that can protect us against the foul magics out there, even in death. Most o' the ingredients are already mixed for ya, but it's missin' one key ingredient: bones! Fortunately, there's enough o' them blasted undead horrors out there for you t' get what's needed. Take their bones from 'em, an' then grind 'em into the elixir. Trust me, ye'll know when ya' got the mixture just right. Once it's all in there, use it on the fallen Dwarfs in the battlefield, so they can finally rest in peace. Y' got all that?

Travel to the outskirts of Oathhold, and join the battle against the undead. Recover Bone Fragments by killing the Soulless found there. Once you have enough bone fragments, mix them into the elixir by using the Mortar and Pestle in your inventory.