Llwyd decides to avenge this insult upon Pwyll's son, Pryderi by making barren and empty the kingdom of Dyfed.
Llwyd seems to make Rhiannon bear the yokes of his horses, while Pryderi has to carry the gate hammers during their captivity.
He finally reveals himself as Llwyd in disguise and admits that the mice were really his attendants magically transformed.
The mouse is his pregnant wife, Gwenaby, but Manawydan refuses to free her until Llwyd also releases Rhiannon and Pryderi and pledges to take no further revenge.
After stealing a cauldron from Diwrnach the Irishman, Arthur and his men land at Llywdeu's house in Porth Cerddin in Dyfed.