Arthur vs Lancelot

Then he stands over them and goes “I am the greatest knight of all time!” Arthur sees this and challenges him to a battle and they stalemate, each being literally invincible thanks to Excalibur and Lancelot’s virtue hax. So, Arthur laughs and goes “Hey, Wanna be my best friend? Lancelot’s like “DO I!?”

Arthurian Myths Retold pg 158