What explanation does the green knight give Gawain on the three swings at him? What other surprise does he tell Gawain
We find out that the Green Knight is actually Lord, and that Gawain's interactions with his wife have a been a test. Then, the Green Knight reveals that he is really Bertilak de Hautdesert, servant to the sorceress Morgan le Fay. It was Morgan who engineered the entire game, sending Bertilak down to Camelot so that Guinevere would be shocked to death by the staged beheading. In fact, Morgan was the ancient noble lady at Hautdesert castle and is the scheming half-sister to Arthur, the king's traditional nemesis.
http://www.gradesaver.com/sir-gawain-and-the-green-knight/study-guide/section4/
