'It will be easy for me to compass this, though thou mayest think it will not be easy,' Kilwch answered him.
'Though thou get all these things yet there is that which thou wilt not get. Throughout the world there is none that can hunt with this dog save Mabon the son of Modron. He was taken from his mother when three nights old, and it is not known where he now is, nor whether he is living or dead, and though thou find him yet the boar will never be slain save only with the sword of Gwrnach the giant, and if thou obtain it not neither shalt thou obtain my daughter.'
'Horses shall I have, and knights from my lord Arthur. And I shall gain thy daughter, and thou shalt lose thy life.'
The speech of Kilwch the son of Kilydd with Yspaddaden Penkawr was ended.
Then Arthur's men set forth, and Kilwch with them, and journeyed till they reached the largest castle in the world, and a black man came out to meet them.
'Whence comest thou, O man?' asked they, 'and whose is that castle?'
'That is the castle of Gwrnach the giant, as all the world knows,' answered the man, 'but no guest ever returned thence alive, and none may enter the gate except a craftsman, who brings his trade.' But little did Arthur's men heed his warning, and they went straight to the gate.
'Open!' cried Gwrhyr.
'I will not open,' replied the porter.
'And wherefore?' asked Kai.