With your back to the window hold the black mirror in your hands so that you can see both your face and the reflected full moon. Concentrate on your reflection and when ready, say:

I call upon the powers of the full moon
Reflected sun in the dark night sky
To empower my spell and send my likeness
To light my lover's dreams in darkness.
Go now, put [name] in mind of me
As I wish, so mote it be

Close the circle.