Cain hands over the book, which the clerics take a moment to admire before the acolyte reads it and learns the skill. The first thing she uses it for is to take a page from Cain's desk and recreate the scene currently in the garden, with all her friends happily celebrating and the flowers in full bloom.
The result is a small but beautiful painting on a cheap sheet of paper. To Cain, it is more like a print, with the image lying smoothly on the sheet, but it is not quite photo-realistic, having the style and slight blurriness of an oil painting. That's more than enough to impress the other acolytes though, and now she doesn't need to fear for her future in the clergy. She has the perfect skill for her newly assigned role.
