Pwyll is the last legendary king of the Elves and friend of Arawn. He believed in the heavenly messengers of the Creator, but he had to fight against them for the survival of the Elves.
After receiving the revelation and understanding of Myrddin's love for the race on earth and knowing that the self-righteous White Spirits will continue to purge their wrath against every living things on earth he stood up and walked the Way of the King and he led every living creature on Earth to battle against the Army of Heaven
They finally achieved total victory at Avalon Castle, where Arawn as bait to drawn the entire Army of Heaven. Pwyll had the entire Army of Heaven surrounded and destroyed with a great price of lives sacrificed and Arawn, who enter into a deep sleep due to the grieve injury he suffered in that battle.
His name comes from a Celtic mythology of the same name.