Coalescing around a Spirit Torment and their attendant Chainghasts... 

the Cursed Shacklehorde hunt down smaller enemy contingents with the express purpose of dragging their souls to an underworld gaol. These three heroes are accompanied by 10 Bladegheist Revenants, 10 Dreadscythe Harridans, and two Dreadblade Harrows who gallop after stragglers on their spectral steeds.