No one knows for sure what would happen if three days without a battle ever occurred, but even scarred veterans tremble just to think of it. Two days without a battle and Grimgor would smite anything he could reach, save (perhaps) his fellow Black Orcs.
If a single day went by without a battle, Grimgor was known to start camp-decimating arguments, his one good eye blazing with eagerness to find fault and start a good scrap.
Even for a Black Orc, Grimgor's thirst for war was exceptional.