Ceridwen. Goddess of the moon grain shape-shifting manifestation intelligence knowledge foresight poetry and letters.
Ceridwen is a powerful Welsh sorceress and one of the most powerful witches in Celtic mythology. A mother and a wise woman all at once she is blessed by the gift of poetic wisdom inspiration and prophecy called collectively Awen in Welsh lore. She can brew life-altering potions to change her form and to inspire knowledge and beauty in others. In some tellings of her legend she is a goddess of creation and inspiration giving her further powers.
This power comes from her magical cauldron where she brews great potions to help others.
Elsewhere in the legends of the Celtic world cauldrons of inspiration are highly common making Ceridwen’s cauldron one of the most archetypal symbols of power.
She is the triple goddess of Maid Mother and Crone shape shifting between life and death. This aspect of her I've illustrated with the flowers on her black cape. Flowers have long been associated with fleetness of beauty and life being fickle in the big span of over all existence. This also brings out her aspect of ruling over both life (flowers) and death (darkness).
She's also one of the few deities that possess the power of all elements: air for the knowledge that came from her brew fire for the fiery tenacity of her motherhood water for her love of her children and earth for her ability to make the impossible idea into tangible reality.
Ceridwen is similar to a number of witches across the world namely the witch goddess Circe in Greece and Baba Yaga in Slavic mythology