In my line, we use some variation of this invocation for most rituals. I like to have some sort of basic structure, around which we can make changes pertinent to the work.
You will notice that there are no Names used in this prayer. We work more with the spirits of *this* time and place, which is always changing. After this invocation, I might call on Brigid because she is one of my Mothers. Another person might call on Cernunnos, his patron. Someone else might ask the spirit of their grandmother to be present. Those invocations are often intensely personal and spoken directly from the heart in the moment.
I hope this prayer serves you well.
We invite you and invoke you
Lady and Lady
Lord and Lord
Lord and Lady
And all between
Great God Hirself
In all your permutations
Goddesses of milk and truth
The open willing earth
Flowering compassion
Rooted in love
Gods of fire and beauty
The first thrusting green
Brilliant joy
Growing in strength
All helpful Beings
of change and truth and trust
Be with us this Equinox day
That we may learn to wield our power with grace
As you do
That we may learn to love wild and free
As you do
That we may know the utter bliss of union with all things
As you do
Hail and be welcome
Blessed be