The Chalk of Fate is an ancient artifact in possession of the Light, protected by Geser. The legends say that in the hands of a mortal or normal Other it is virtually useless, but in the hands of a Light Enchantress it can be used to rewrite someone's Book of Fate. In ''Night Watch'', the Chalk is broken into two pieces, to be used by two enchantresses at the same time: Svetlana Nazarova, who erased Yegor's Darkness, and Olga, who made an entry into Svetlana's Book of Fate. It is assumed that after this either Geser kept possession of the Chalk or the Inquisition filed it in their archives.