Arthur fighting Rience

So, Arthur, as a 20-year-old King is surveying his lands, and he finds out his buddy, Leodegrance has been kidnapped by an evil king named Rience. Arthur, never one to abandon a friend or turn down a fight, gathers up an army to rescue him. So, Arthur and company turn up at Rience's castle and Arthur goes "Rience, you know who I am. You know how this will end. I am BEGGING you, tears in my eyes. Free Leodegrance or I will turn this grassland into a marsh with your blood."
Rience replies "See, I'd be more scared if I didn't have an army and a GOD DAMNED GIANT!" And attacks.
So, they fight, and Arthur shows OUT! He kills so many people, Rience's bloodline was legally listed as an endangered species. At a certain point, Rience had to put an extra rear guard to get people to stop running away from Arthur’s blades. Oh, and Arthur slays the giant, cutting his legs off, making a pun by yelling “Now I find you a better size to deal with!” then cutting his head off and letting the body crush six people. After a certain point, people just start throwing themselves into other people’s spears to get away from Arthur.

Arthurian Myths Retold pg 33-34