The Reaper's Cudgel (Origins)

Acquisition

 * Earn the Grim Reaper achievement by defeating the Harvester on Hard or Nightmare difficulty in the Golems of Amgarrak DLC. Increasing the difficulty to Hard or Nightmare immediately before dealing the final blow to the Harvester will not grant you the achievement or the mace; you need to have completed the full course of the battle in either difficulty.