Editing Gwyn ap Nudd (section)

===As part of Arthur's retinue===
{{Main|Culhwch and Olwen}}

Before he can win [[Olwen|Olwen's]] hand, [[Culhwch|Culhwch ap Cilydd]] must complete a number of seemingly impossible tasks given to him by Olwen's father, the giant [[Ysbaddaden]]. One of these tasks is to retrieve the comb and scissors from the head of the vicious boar, [[Twrch Trwyth]]. As it is impossible to hunt the boar without Gwyn's aid, he is called upon to join [[King Arthur|Arthur]] and his retinue against Twrch Trwyth. During the hunt, he is mounted on Du y Moroedd, the only horse that can carry him. Both Gwyn and Gwythyr set out with Arthur to retrieve the blood of [[Orddu, Orwen and Orgoch|Orddu]], witch of the uplands of hell.<ref name="Culhwch ac Olwen"/>