At a council at Caer Dallben, Prince Gwydion explained to all the kings and war leaders assembled that Arawn Death-Lord was using the Black Cauldron to create more of the Cauldron-Born, deathless warriors. Gwydion's plan was to seize the Cauldron and destroy it. The plan proceeded apace, involving a diversionary military assault, until Doli discovered that the evil pot vanished. One of the Fair Folk disclosed that it had been taken by Orddu, Orwen, and Orgoch, and Taran, Eilonwy, Fflewddur and Gurgi set out to find it.