Eurybia

EURYBIA was the goddess of the mastery of the seas. She seems to have presided over the external forces which influenced the main, including the rise of the constellations and seasonal weather, and the power of the winds. Her husband was the Titan Krios, who may have been associated with the constellation Aries, marker of the Greek new year. Her grandchildren all had power over the sea. They included the Anemoi (Winds), the Astra (Stars), Hekate (Witchraft), Selene (the Moon), Nike (Victory), Bia (Force), Kratos (Power), Zelos (Rivalry). Some of these represent human command of the seas : the winds for sailing, stars for navigation, and force, power and victory representing naval supremacy.

According to Hesiod's Theogony, Εὐρυβία had a heart of flint within her. She was the daughter of PONTOS (the Sea) & GAIA (the Earth). So if the sea makes love to the Earth, it erodes the rock, deposits it somewhere else, and makes chalk - which has a heart of flint. So I wonder if Eurybia was also a goddess of chalk? As someone who was born on the chalk, I find it very magical. Also Εὐρυβία is the grandmother of Hekate, goddess of witchcraft. I read somewhere recently that Doreen Valiente found chalk landscapes very conducive to magic.

As goddess of the sea and the winds, Eurybia is very closely allied to witchcraft, because witchcraft was often about the control of the winds; witches used to tie knots to bind or release the wind. And of course, the sea symbolises either the subconscious or the collective unconscious, the supernal mother.

I am the soundless, boundless bitter sea
Out of whose depths life wells eternally
ASTARTE, APHRODITE, ASHTORETH
Giver of life and bringer-in of death;
HERA of heaven, on earth, PERSEPHONE;
LEVANAH of the tides and HECATE
All these am I, and they are seen in me
I am the soundless, boundless, bitter sea
All tides are mine, and answer unto me.

~ Dion Fortune