So he made answer to Pryderi's objections thus:
"Keep your promise to your people, oh, most honored Pryderi, and only exchange them for the gift I make thee," said Gwyd.
Thereupon, exerting his powers of magic, he created the illusion of twelve superb horses. These were all saddled, bridled, and magnificently caparisoned. But, after twenty-four hours, they would vanish from sight. The illusion would be over.
With these steeds, so well fitted for hunting, were twelve sleek, fleet hounds. Taken altogether, here was a sight to make a hunter's eyes dance with delight.
So Pryderi gave Gwyd the swine, and he quickly drove them off.
"For," he whispered to his companion fellows in knavery, "the illusion will only last until the same hour to-morrow."
And so it happened. For when Pryderi's men went to the stables, to groom the horses and feed the hounds, there was nothing in either the stables or the kennels.
When they told this to Pryderi, he at once blew his horn and assembled his knights, to invade the country of Gwynedd, to recover his swine. Hearing of his coming, King Math went out to meet Pryderi in battle.
But while he was away with his army, Gily, the lover, seized the beautiful maiden Goewen, who held the king's feet in her lap.
She was not willing to marry Gily, but he eloped with her, and carried her off to his cottage.