The Bonecrushers feed upon the corpses of the fallen, but they are still young to this world. They have not yet built a resistance to the foul diseases that we find common. Sift through the bones, and seek out those that are plagued by even the weakest of diseases. Bring these putrefied corpses to me, so that they are not consumed by the Bonecrushers. I will draw from them the weakest diseases, and use them to strengthen the immunity of the Bonecrushers.