This is one of my favorite tools. Its objective is to bring awareness and consciousness around something you want to create.
So many energies are involved around creating something, bringing something new into our life that sometimes it is hard to untangle all that concerns us or that which might be getting in the way to creating and having what we want.
David Spangler's card deck works to bring to the surface our fears and hesitations, our strengths and resources and assists in moving to clarity and manifestation. You can get the cards here: http://lorian.org/booklist.php#gpm1_4