Stones of Light
There was an ancient society of druids that studied the mysteries and had a code for the degree of Light in any situation or thing. Light meant to these Old Ones the degree of wisdom and knowledge contained or through which one contemplated something else. The measure of this light was a Stone.
The Old Ones said there was no such thing as complete darkness, for even when walking in the darkest night beneath a moonless sky there was always the distant glimmer of starlight. Such a measure was called One Stone of Light. From there, stones were added as wisdom and knowledge increased, or access to wisdom and knowledge became more easily attained. Twelve Stones of Light was the highest degree of enlightenment one could reach, as if standing in the center of a supernova.
For this Oracle, Zy has adopted their system adding to a planet in a sign in a house a certain number of stones of light. He reminds you that darkness is not ignorance, nor evil, but rather a place and time where wisdom and knowledge is hidden and one must look deeply to attain it. In Twelve Stones, of course, enlightenment is easy, perhaps unavoidable.
Humans, however, are remarkable in their ability to avoid Light, even when standing in the center of a sun.
Contrarywise, even the gods are amazed how a human heart will sometimes find Light in the darkest of times and places, brightening a soul with it forever.