Grimghast Reapers, Nighthaunts

In life, those who were to become Grimghast Reapers were careful and meticulous killers. In death, they never cease in their long, sweeping strokes that mercilessly cut the enemy down a rank at a time, and they never tire. Like clockwork, they endlessly repeat their deadly shearing strikes. The grim spectres move quickly, hovering down to attack, doing so with jarring motions antithetical to the graceful movements of the living. They seem to start and stop, travelling in convulsive bursts; but they are fast