He helped the witch Caridwen tend the cauldron in which she spent a year boiling a potion that would yield three drops. When those drops accidentally fell on his finger, he swallowed them, and a chase ensued in which, after many transformations, the  witch turned herself into a hen and ate the boy disguised as a grain of wheat. FTP, give the better known name of Gwion Bach, who was caught in a fish trap and called by his nickname because of his radiant brow, and who became an omniscient Welsh bard.
He helped the witch Caridwen tend the cauldron in which she spent a year boiling a potion that would yield three drops. When those drops accidentally fell on his finger, he swallowed them, and a chase ensued in which, after many transformations, the  witch turned herself into a hen and ate the boy disguised as a grain of wheat. FTP, give the better known name of Gwion Bach, who was caught in a fish trap and called by his nickname because of his radiant brow, and who became an omniscient Welsh bard.
He helped the witch Caridwen tend the cauldron in which she spent a year boiling a potion that would yield three drops.
Taliesin