I think, though you may feel free to correct me, that he's a word bearer who happens to be implanted into the warband, probably to both assist with spiritual activities involving Khorne as well as tend to the needs of the Blood Pact/mortal troops in the warband's care.
Wait. Are there Dark Apostles in the World Eaters? :O
I think, though you may feel free to correct me, that he's a word bearer who happens to be implanted into the warband, probably to both assist with spiritual activities involving Khorne as well as tend to the needs of the Blood Pact/mortal troops in the warband's care.