The man shook his head and said, "That big sword can't save you, boy."
"Now be a good boy and come over. I won't kill you. I just want to take a layer of skin off of your buttocks for causing me so much trouble."
Actually, he wants to kill Arthur. But he can't because the people who sent him repeatedly told him not to kill Arthur. They only asked him to warn Arthur off.
He isn't supposed to harm Arthur, but he wants revenge for all the trouble that Arthur has caused him. Arthur's giant sword won't stop him from getting that revenge.
Arthur asked with suspicion, "Who are you?"
The man shook his head, "No more questions. Now get over here."
He growled that last part. Even so, Arthur refused to go over to have the flesh of his buttocks split open. This understandably got the man angry.
The man's body bulged slightly as a lot of his muscles contracted. This caused an explosive force to appear in his body.
