The Druid Tome was a magic book which contained Samhain during the Middle Ages. In the present day Captain America discovered the book in Greymoor Castle. He give the book to the Scarlet Witch as a house-warming gift, when she and the Vision moved to Leonia, New Jersey for the first time. Samhain used a combination of the Scarlet Witch's magic, his own magic and the magic of Halloween in an attempt to be reborn. The Druid Tome was apparently destroyed when the Scarlet Witch used her hex powers to throw the book into a fire.

Unfortunately, the Druid Tome wasn't fully destroyed and as long as ashes remained, Samhain could return. Samhain attempted to return with the aid of the Salem Seven, by kidnapping the Scarlet Witch. Thanks to Illusion's powers, the Vision managed to reform the book, and then annihilated it with his solar beams.