A stranger enters the castle and is greeted by King Arthur. He explains that he comes in peace and later proposes the idea that anyone in the castle who is strong enough, can strike his neck with his axe. No one in the castle stands to do this and the stranger begins taunting King Arthur, questioning his power.
“When no one answered, he coughed, as if embarrassed, … / Overwhelmed by a word out of one man’s mouth! / You shiver and blanch before a blow’s been shown!” (line 86 - 94)
“He held his head in his hand up high before him, / Addressing the face to the dearest of all on the dais” (line 168 - 170) “And haled away through the hall-door, his head in his hand, / And fire of the flint flew out from the hooves of the foal.” (line 182 - 183)
King Arthur offers to play the Green Knight’s game but his men are astonished. Sir Gawain offers to take the Kings place and cuts the Green Knight’s head off. The Knight then takes his own head, which has been chopped off, and leaves the scene.
I'll do it.
No, I will sir.
Take my green and gold sash
Gawain goes to the Knight’s castle, and while the lord is gone, the lady attempts to seduce Gawain. She offers him a gold ring and begs him to take it. Sir Gawain refuses because he does not wish to be in debt. The lady then offers him her green and golden sash. He refuses again.
“Having nothing to give, I’d be wrong to take gifts in turn. / She implored him again, still more earnestly, but again / He refused it and swore on his knighthood that he could take / nothing.” (line 196 - 198)