THE GREATER TRUMPS by Charles Williams
The original Tarot deck is used to unlock enormous metaphysical powers by allowing the possessors to see across space and time, create matter, and raise powerful natural storms.
Upon an ancient golden table, golden figurines perpetually move "by some magnetism of the Earth" to the "Great Dance" - that is, the rhythm of all things that happen in this world. The table and figurines are half of a set. The other half is the original Tarot cards. Together, it is believed, they have the power to explain eachother's mysteries, and maybe even manipulate time, space, and the elements.
By some great coincidence, or movement of the Dance, two families are brought together who each have one half of the set.
But when the pieces are reunited, all hell...and heaven break loose!