From the introduction:
You are the prophet of a god, their mouthpiece in this world, translating their unknowable voice to those who can’t hear them. Each prophecy comes to you in impressions of images, musical melodies, flashes of color and light and scent. You must do your best to interpret these visions into something others can understand.
To receive a new prophecy, roll a six-sided die and place cards face down equal to the number rolled.