In Norse Mythology the Goddess Freya is the leader, or Queen of the Valkyries. Valkyries, (pronounced val-kye-reez), are described as being the "Choosers of the Slain" in battle. They are female attendants of Odin and they direct the course of battles, choosing the most valiant warriors for Valhalla.
In Old English they were called waelceasig. Tradition says there are thirteen of them. Brynhild as Sigdrifa (Victory-Giver) was a Valkyrie. She initiated Sigurd into runic wisdom.
They are helmeted goddesses with spears crowned with flames and mounted on flying horses whose manes dropped dew or hail. They can also turn themselves into Swan-Maidens. They are death angels, mare-women (the "horse" is representitive of the Norse cult of the Volsi). Valkyries are associated with horses, wolves, fearlessness, war and death.
Invocation for Freya as a Valkyrie Leader:
Queen of the Warrior-Women,
Freya of the Black Swordhand,
Mistress of Magic, enchantments deep,
You who beckon to fallen heroes,
Harken to this, your child.
I would weave strong magic for protection,
Deep magic to bind and chasten.
I lift up my sword to repel all attackers.
Beware, foul troublemakers!
For Freya whispers her spells in my ear.
Freya, Queen of the Valkyries, stands at my side.
May Freya's Blessings be yours,