The Codicil of White is a tall, thin volume bound in white ermine fur over seasoned boards of white pine and sealed with a clasp and lock of tarnished silver.
The book is cold to the touch, and the fur is worn about the edges from use. The twenty-seven pages within are of vellum painted with silver gilt on the outer edges. The whole is sewn to a leather binding with strips of sinews, making it quite durable.
A creature with the Codicil in its possession has resistance to cold damage.
The codicil was written by followers of Auril as a primer on her worship. The first page is a title page with the snowflake symbol of Auril on it. The remaining pages describe various priestly rituals and ceremonies in chilling detail. Nestled among these descriptions is a spell that wizards can learn "Frost Fingers", and a poem called "Rime of the Frostmaiden"