Cadaver Collectors are massive, humanoid-looking constructs that are superficially similar to Warforged Titan. They are covered in spikes of various lengths, some barbed, some not, which jut out in all directions. They adorn themselves with the corpses of fallen soldiers, impaling them on it's many spikes. They are found primarily in the Mournland, where they wander the many battlefields that litter the landscape.
Nobody knows who built the Cadaver Collectors, or why. One theory is that they were built by Karrnathi artificers as a means of gathering more dead for their necromancers, but the Karrnathi crown has denied this. There are no records of these constructs existing prior to the Day of Mourning. Nevertheless, whether they were created by Karrnath or not, the constructs seem to be imbued with necromantic magic, and they are capable of summoning forth the souls of the corpses they've adorned themselves with.