On the battlefield, the Reaper Guard was the most efficient at killing enemies, thanks to its lv9 Monarch strength, leaving it virtually unmatched.
The Reaper Guard's ability to easily kill the orc Chieftain was due not only to its high level but also to the enhancements provided by Death Spirit.
Death Spirit played a crucial and powerful support role on the battlefield. However, this also meant that Death Spirit couldn't summon the orc corpses into undead in a timely manner, as it had split into over eighty Clones, consuming a significant amount of energy. Even at lv9, possessing and enhancing over eighty Monarchs was taxing.
At this moment, more than seventy Monarch level orcs had been slain, and Death Spirit released some of the possessed undead to focus on another task: summoning undead.