Book of the Beast

The Book of the Beast is an ancient text where witches inscribe their names in to devote themselves to the Dark Lord and the Path of Night.

Description
On the night of a witch's sixteenth birthday, she has to pledge allegiance to the Dark Lord in a ceremony known as a dark baptism. There, the witch has to sign her name in the Book of the Beast with her own blood. Once this has occurred, the witch is forever bound in servitude to the Dark Lord.

The Book of the Beast is not always called upon during a witch's dark baptism. Sabrina Spellman was able to sign her name in the book even after she initially refused to do so on her sixteenth birthday. However, it should be noted that the Dark Lord specifically sent Madam Satan to manipulate Sabrina into choosing the Path of Night, so using the Book of the Beast outside of dark baptisms might be rare.

Season 1
In "Chapter Two: The Dark Baptism", the Book of the Beast was present at the dark baptism of Sabrina Spellman. As Father Blackwood guided Sabrina into signing her name in the book, she realized that she did not want to give up her mortal life and follow the Path of Night. Subsequently, Sabrina decided to flee from her dark baptism.

In "Chapter Three: The Trial of Sabrina Spellman", Father Blackwood revealed that Sabrina's father, Edward Spellman, had signed his daughter's name in the Book of the Beast so he could marry a mortal woman.

In "Chapter Ten: The Witching Hour", Madam Satan manipulated Sabrina into signing her name in the Book of the Beast so she could acquire the power necessary to defeat the Greendale Thirteen.

Season 1

 * "Chapter Two: The Dark Baptism"
 * "Chapter Three: The Trial of Sabrina Spellman"
 * "Chapter Ten: The Witching Hour"