bloodlust

noun

1. (countable, uncountable)A desire for bloodshed and carnage, often aroused in the heat of battle and leading to uncontrolled slaughter and torture.

   “Yet the blood lust was on me now. I found myself on my feet emptying one magazine, then the other, clicking open the breech to re-load, snapping it to again, while cheering and yelling with pure ferocity and joy of slaughter as I did so.”