Branwen Daughter of Llyer Motif

The motif of magic appears many times throughout the story of Branwen Daughter of Llyr. All the offspring of Llyer and the two half brothers have powers because their mother was a fairy. The first time is when after Branwen has been married and Mathowych treats her bad and makes her cook for him for years she uses magic to teach a bird who her brother is, the King of Whales. She then wrote a letter and put it in the bird’s feathers and had it bring the letter to her brother to let him know how bad she was being treated so he could save her.
After Bendigeifran received the letter he brought his whole army except seven men and went across the sea to Ireland to engage in battle and rescue his sister. He uses his magic powers to turn into a giant and walk across the water while the other men were in the ships. He then laid himself down across a river to be used as a bridge for his men.
After Bendigeifran and his men won the battle the Irish men agreed to build him a house big enough for him to fit in because he had never been contained in one before. But after they built it they hid inside it in bags planning to kill Bendigeifran. But his brother, Efnisien noticed these bags and he, being a giant as well killed all the men inside the bags by squishing them with his fingers. Then as the Irish men were putting their men inside the cauldron of resurrection Efnisien pretended to be dead so they would thrown him in, and when he got in he expanded himself into a giant and exploded the cauldron so they could not resurrect their men, but he died as he did it.
After the battle Bendigeifran was poisoned so he told his men to cut off his head because it was magic. So they did and they used it as protection.