The men came to violent blows, and although Euron landed a couple of deep stabs with his sword, Jaime was victorious and staggered away bleeding with Euron dying on the beach.
Euron commented on Jaime’s status as “Kingslayer,” and how he would be double Kingslayer if he killed Euron.
“I’m the man who killed Jaime Lannister.”
He met up with Jaime — who was trying to get to Cersei — on the beach, and Jaime didn’t take it so well when he learned that Euron had slept with Cersei.