In Welsh mythology and literature, the Pair Dadeni (The Cauldron of Rebirth) is a magical cauldron able to revive the dead. It plays a key role in the second branch of the Mabinogi. It has parallels with a number of other magic cauldrons in Welsh legend and folklore, including cauldron of Diwrnach the Irishman in Culhwch and Olwen, the cauldron of the Head of Annwn in Preiddeu Annwfn and the cauldron of Cerridwen in the tale of Taliesin.
The cauldron belonged initially to the giant Llasar Llaes Gyfnewid and his wife Cymydei Cymeinfoll, who lived within the Lake of the Cauldron, in Ireland. Discovered by the Irish king Matholwch, they were given a place at his court, but soon earned the contempt of the Irish for their behaviour. Ultimately, the Irish attempted to burn them to death within their Iron House, forcing the giant and giantess to flee to the Island of the Mighty, where they are received by King Bendigeidfran. In response to his hospitality, the giants give the cauldron to Bendigeidfran as a gift.
Marching on to Dinas Brân
The ravens called his name
Bearer of the Eagle Red
To Britain Macsen came
A dream of certain death
Unveiled to him one night
Incursion of the Scots and Picts
The onset to the fight
Possessed by battle lust he fell
For that day he would meet his end
But the dream did not reveal
The power of the grail of Brân
The shards still held strength
Honouring his brave demise
The druids baptised him
Before he died
The shards of Pair Dadeni,
Restored and blessed again
The cauldron of Rebirth,
Immortalised through Brân
The past no longer of concern
Only future you can effect
A single dream can make a change
Reshape the world and alter fate
The shards of Pair Dadeni,
Restored and blessed again
The cauldron of Rebirth,
Immortalised through Brân
Magic shards restored his life
Miracle for all men to see
In his veins its power reigned
What about his guiding dreams?
Crowned King at Dinas Brân
The ravens called his name
Bearer of the Dragon Red